diff --git a/Cargo.lock b/Cargo.lock
index b72d36fa56ef0..3a32192e657a3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -30,8 +30,8 @@ version = "0.0.0"
 dependencies = [
  "compiler_builtins",
  "core",
- "rand",
- "rand_xorshift",
+ "rand 0.7.3",
+ "rand_xorshift 0.2.0",
 ]
 
 [[package]]
@@ -150,6 +150,15 @@ dependencies = [
  "rustc-std-workspace-core",
 ]
 
+[[package]]
+name = "base64"
+version = "0.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
+dependencies = [
+ "byteorder",
+]
+
 [[package]]
 name = "base64"
 version = "0.11.0"
@@ -247,12 +256,6 @@ dependencies = [
 name = "build_helper"
 version = "0.1.0"
 
-[[package]]
-name = "bumpalo"
-version = "3.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5356f1d23ee24a1f785a56d1d1a5f0fd5b0f6a0c0fb2412ce11da71649ab78f6"
-
 [[package]]
 name = "byte-tools"
 version = "0.3.1"
@@ -281,15 +284,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "206fdffcfa2df7cbe15601ef46c813fce0965eb3286db6b56c583b814b51c81c"
 dependencies = [
  "byteorder",
+ "either",
  "iovec",
 ]
 
-[[package]]
-name = "bytes"
-version = "0.5.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "130aac562c0dd69c56b3b1cc8ffd2e17be31d0b6c25b61c96b76231aa23e39e1"
-
 [[package]]
 name = "bytesize"
 version = "1.0.1"
@@ -441,9 +439,9 @@ version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8d4620afad4d4d9e63f915cfa10c930b7a3c9c3ca5cd88dd771ff8e5bf04ea10"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "synstructure",
 ]
 
@@ -601,32 +599,13 @@ dependencies = [
  "unicode-segmentation",
 ]
 
-[[package]]
-name = "codespan"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7216bea5dad777b759fc5360cc35ad9151643a84a9b8a9fcea0d15889cc8f3ca"
-dependencies = [
- "codespan-reporting 0.9.4",
-]
-
 [[package]]
 name = "codespan-reporting"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "efd1d915d9e2b2ad696b2cd73215a84823ef3f0e3084d90304204415921b62c6"
 dependencies = [
- "codespan 0.5.0",
- "termcolor",
- "unicode-width",
-]
-
-[[package]]
-name = "codespan-reporting"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2ceface2475f2f57a7ece9ba239b96e06bda8323ee68aa6df539752f13a74f60"
-dependencies = [
+ "codespan",
  "termcolor",
  "unicode-width",
 ]
@@ -662,9 +641,9 @@ dependencies = [
 
 [[package]]
 name = "compiler_builtins"
-version = "0.1.29"
+version = "0.1.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da3e309b268ae176ec048f30a58369db0a7527cddd3546275355b68130652c91"
+checksum = "7bc4ac2c824d2bfc612cba57708198547e9a26943af0632aff033e0693074d5c"
 dependencies = [
  "cc",
  "rustc-std-workspace-core",
@@ -739,11 +718,39 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
+[[package]]
+name = "cookie"
+version = "0.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "888604f00b3db336d2af898ec3c1d5d0ddf5e6d462220f2ededc33a87ac4bbd5"
+dependencies = [
+ "time",
+ "url 1.7.2",
+]
+
+[[package]]
+name = "cookie_store"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "46750b3f362965f197996c4448e4a0935e791bf7d6631bfce9ee0af3d24c919c"
+dependencies = [
+ "cookie",
+ "failure",
+ "idna 0.1.5",
+ "log",
+ "publicsuffix",
+ "serde",
+ "serde_json",
+ "time",
+ "try_from",
+ "url 1.7.2",
+]
+
 [[package]]
 name = "core"
 version = "0.0.0"
 dependencies = [
- "rand",
+ "rand 0.7.3",
 ]
 
 [[package]]
@@ -831,9 +838,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-queue"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c695eeca1e7173472a32221542ae469b3e9aac3a4fc81f7696bcad82029493db"
+checksum = "ab6bffe714b6bb07e42f201352c34f51fefd355ace793f9e638ebd52d23f98d2"
 dependencies = [
  "cfg-if",
  "crossbeam-utils 0.7.2",
@@ -872,15 +879,6 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
-[[package]]
-name = "ct-logs"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d3686f5fa27dbc1d76c751300376e167c5a43387f44bb451fd1c24776e49113"
-dependencies = [
- "sct",
-]
-
 [[package]]
 name = "ctor"
 version = "0.1.14"
@@ -888,7 +886,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf6b25ee9ac1995c54d7adb2eff8cfffb7260bc774fb63c601ec65467f43cd9d"
 dependencies = [
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -968,9 +966,9 @@ version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "71f31892cd5c62e414316f2963c5689242c43d8e7bbcaaeca97e5e28c95d91d9"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -979,9 +977,9 @@ version = "0.99.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2127768764f1556535c01b5326ef94bd60ff08dcfbdc544d53e69ed155610f5d"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -1157,7 +1155,7 @@ name = "expand-yaml-anchors"
 version = "0.1.0"
 dependencies = [
  "yaml-merge-keys",
- "yaml-rust 0.4.3",
+ "yaml-rust 0.4.4",
 ]
 
 [[package]]
@@ -1176,9 +1174,9 @@ version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "aa4da3c766cd7a0db8242e326e9e4e081edd567072893ed320008189715366a4"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "synstructure",
 ]
 
@@ -1283,6 +1281,12 @@ dependencies = [
  "byteorder",
 ]
 
+[[package]]
+name = "fuchsia-cprng"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
+
 [[package]]
 name = "fuchsia-zircon"
 version = "0.3.3"
@@ -1316,69 +1320,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1b980f2816d6ee8673b6517b52cb0e808a180efc92e5c19d02cdda79066703ef"
 
 [[package]]
-name = "futures-channel"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f366ad74c28cca6ba456d95e6422883cfb4b252a83bed929c83abfdbbf2967d5"
-dependencies = [
- "futures-core",
-]
-
-[[package]]
-name = "futures-core"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59f5fff90fd5d971f936ad674802482ba441b6f09ba5e15fd8b39145582ca399"
-
-[[package]]
-name = "futures-io"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de27142b013a8e869c14957e6d2edeef89e97c289e69d042ee3a49acd8b51789"
-
-[[package]]
-name = "futures-macro"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d0b5a30a4328ab5473878237c447333c093297bded83a4983d10f4deea240d39"
-dependencies = [
- "proc-macro-hack",
- "proc-macro2 1.0.17",
- "quote 1.0.6",
- "syn 1.0.27",
-]
-
-[[package]]
-name = "futures-sink"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f2032893cb734c7a05d85ce0cc8b8c4075278e93b24b66f9de99d6eb0fa8acc"
-
-[[package]]
-name = "futures-task"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdb66b5f09e22019b1ab0830f7785bcea8e7a42148683f99214f73f8ec21a626"
-dependencies = [
- "once_cell",
-]
-
-[[package]]
-name = "futures-util"
-version = "0.3.5"
+name = "futures-cpupool"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8764574ff08b701a084482c3c7031349104b07ac897393010494beaa18ce32c6"
+checksum = "ab90cde24b3319636588d0c35fe03b1333857621051837ed769faefb4c2162e4"
 dependencies = [
- "futures-core",
- "futures-io",
- "futures-macro",
- "futures-task",
- "memchr",
- "pin-project",
- "pin-utils",
- "proc-macro-hack",
- "proc-macro-nested",
- "slab",
+ "futures",
+ "num_cpus",
 ]
 
 [[package]]
@@ -1480,28 +1428,27 @@ version = "0.0.0"
 
 [[package]]
 name = "h2"
-version = "0.2.5"
+version = "0.1.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "79b7246d7e4b979c03fa093da39cfb3617a96bbeee6310af63991668d7e843ff"
+checksum = "a5b34c246847f938a410a03c5458c7fee2274436675e76d8b903c08efc29c462"
 dependencies = [
- "bytes 0.5.4",
+ "byteorder",
+ "bytes",
  "fnv",
- "futures-core",
- "futures-sink",
- "futures-util",
+ "futures",
  "http",
  "indexmap",
  "log",
  "slab",
- "tokio 0.2.21",
- "tokio-util",
+ "string",
+ "tokio-io",
 ]
 
 [[package]]
 name = "handlebars"
-version = "3.0.1"
+version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba758d094d31274eb49d15da6f326b96bf3185239a6359bf684f3d5321148900"
+checksum = "b37819efea9045a64bf9e40983ee62e20b4e9f0b14aa293e53dde8ac7c517f91"
 dependencies = [
  "log",
  "pest",
@@ -1573,30 +1520,32 @@ dependencies = [
  "log",
  "mac",
  "markup5ever",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
 name = "http"
-version = "0.2.1"
+version = "0.1.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28d569972648b2c512421b5f2a405ad6ac9666547189d0c5477a3f200f3e02f9"
+checksum = "d6ccf5ede3a895d8856620237b2f02972c1bbc78d2965ad7fe8838d4a0ed41f0"
 dependencies = [
- "bytes 0.5.4",
+ "bytes",
  "fnv",
  "itoa",
 ]
 
 [[package]]
 name = "http-body"
-version = "0.3.1"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13d5ff830006f7646652e057693569bfe0d51760c0085a071769d142a205111b"
+checksum = "6741c859c1b2463a423a1dbce98d418e6c3c3fc720fb0d45528657320920292d"
 dependencies = [
- "bytes 0.5.4",
+ "bytes",
+ "futures",
  "http",
+ "tokio-buf",
 ]
 
 [[package]]
@@ -1622,44 +1571,45 @@ checksum = "b9b6c53306532d3c8e8087b44e6580e10db51a023cf9b433cea2ac38066b92da"
 
 [[package]]
 name = "hyper"
-version = "0.13.5"
+version = "0.12.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96816e1d921eca64d208a85aab4f7798455a8e34229ee5a88c935bdee1b78b14"
+checksum = "9dbe6ed1438e1f8ad955a4701e9a944938e9519f6888d12d8558b645e247d5f6"
 dependencies = [
- "bytes 0.5.4",
- "futures-channel",
- "futures-core",
- "futures-util",
+ "bytes",
+ "futures",
+ "futures-cpupool",
  "h2",
  "http",
  "http-body",
  "httparse",
+ "iovec",
  "itoa",
  "log",
  "net2",
- "pin-project",
+ "rustc_version",
  "time",
- "tokio 0.2.21",
- "tower-service",
+ "tokio",
+ "tokio-buf",
+ "tokio-executor",
+ "tokio-io",
+ "tokio-reactor",
+ "tokio-tcp",
+ "tokio-threadpool",
+ "tokio-timer",
  "want",
 ]
 
 [[package]]
-name = "hyper-rustls"
-version = "0.20.0"
+name = "hyper-tls"
+version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac965ea399ec3a25ac7d13b8affd4b8f39325cca00858ddf5eb29b79e6b14b08"
+checksum = "3a800d6aa50af4b5850b2b0f659625ce9504df908e9733b635720483be26174f"
 dependencies = [
- "bytes 0.5.4",
- "ct-logs",
- "futures-util",
+ "bytes",
+ "futures",
  "hyper",
- "log",
- "rustls",
- "rustls-native-certs",
- "tokio 0.2.21",
- "tokio-rustls",
- "webpki",
+ "native-tls",
+ "tokio-io",
 ]
 
 [[package]]
@@ -1698,9 +1648,9 @@ checksum = "c3360c7b59e5ffa2653671fb74b4741a5d343c03f331c0a4aeda42b5c2b0ec7d"
 
 [[package]]
 name = "ignore"
-version = "0.4.15"
+version = "0.4.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "128b9e89d15a3faa642ee164c998fd4fae3d89d054463cddb2c25a7baad3a352"
+checksum = "22dcbf2a4a289528dbef21686354904e1c694ac642610a9bff9e7df730d9ec72"
 dependencies = [
  "crossbeam-utils 0.7.2",
  "globset",
@@ -1721,7 +1671,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "303f7e6256d546e01979071417432425f15c1891fb309a5f2d724ee908fabd6e"
 dependencies = [
  "bitmaps",
- "rand_core",
+ "rand_core 0.5.1",
  "rand_xoshiro",
  "sized-chunks",
  "typenum",
@@ -1813,15 +1763,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "js-sys"
-version = "0.3.40"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce10c23ad2ea25ceca0093bd3192229da4c5b3c0f2de499c1ecac0d98d452177"
-dependencies = [
- "wasm-bindgen",
-]
-
 [[package]]
 name = "json"
 version = "0.11.15"
@@ -1843,7 +1784,7 @@ dependencies = [
  "parity-tokio-ipc",
  "serde",
  "serde_json",
- "tokio 0.1.22",
+ "tokio",
  "url 1.7.2",
 ]
 
@@ -1876,9 +1817,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8609af8f63b626e8e211f52441fcdb6ec54f1a446606b10d5c89ae9bf8a20058"
 dependencies = [
  "proc-macro-crate",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -1913,12 +1854,12 @@ version = "14.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1f06add502b48351e05dd95814835327fb115e4e9f834ca42fd522d3b769d4d2"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "globset",
  "jsonrpc-core",
  "lazy_static",
  "log",
- "tokio 0.1.22",
+ "tokio",
  "tokio-codec",
  "unicase",
 ]
@@ -2047,7 +1988,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "169d737ad89cf8ddd82d1804d9122f54568c49377665157277cc90d747b1d31a"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "serde_json",
  "tokio-codec",
 ]
@@ -2177,12 +2118,12 @@ dependencies = [
 
 [[package]]
 name = "mdbook-linkcheck"
-version = "0.5.1"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b3f4565abe1ca21efbbdaa18b6e09ea97074cf687ad6fab21a936833a773903"
+checksum = "c0a04db564ca37c47771f8455c825dc941ea851ff0deffcf55a04c512406b409"
 dependencies = [
- "codespan 0.9.4",
- "codespan-reporting 0.9.4",
+ "codespan",
+ "codespan-reporting",
  "dunce",
  "either",
  "env_logger 0.7.1",
@@ -2191,7 +2132,7 @@ dependencies = [
  "log",
  "mdbook",
  "percent-encoding 2.1.0",
- "pulldown-cmark 0.7.1",
+ "pulldown-cmark 0.6.1",
  "rayon",
  "regex",
  "reqwest",
@@ -2351,7 +2292,7 @@ dependencies = [
  "hex 0.4.2",
  "log",
  "num-traits",
- "rand",
+ "rand 0.7.3",
  "rustc-workspace-hack",
  "rustc_version",
  "serde",
@@ -2360,6 +2301,24 @@ dependencies = [
  "vergen",
 ]
 
+[[package]]
+name = "native-tls"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2b0d88c06fe90d5ee94048ba40409ef1d9315d86f6f38c2efdaad4fb50c58b2d"
+dependencies = [
+ "lazy_static",
+ "libc",
+ "log",
+ "openssl",
+ "openssl-probe",
+ "openssl-sys",
+ "schannel",
+ "security-framework",
+ "security-framework-sys",
+ "tempfile",
+]
+
 [[package]]
 name = "net2"
 version = "0.2.34"
@@ -2545,13 +2504,13 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8281bf4f1d6429573f89589bf68d89451c46750977a8264f8ea3edbabeba7947"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "log",
  "mio-named-pipes",
  "miow 0.3.4",
- "rand",
- "tokio 0.1.22",
+ "rand 0.7.3",
+ "tokio",
  "tokio-named-pipes",
  "tokio-uds",
  "winapi 0.3.8",
@@ -2646,9 +2605,9 @@ checksum = "99b8db626e31e5b81787b9783425769681b347011cc59471e33ea46d2ea0cf55"
 dependencies = [
  "pest",
  "pest_meta",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -2698,7 +2657,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17367f0cc86f2d25802b2c26ee58a7b23faeccf78a396094c13dced0d0182526"
 dependencies = [
  "phf_shared",
- "rand",
+ "rand 0.7.3",
 ]
 
 [[package]]
@@ -2710,38 +2669,6 @@ dependencies = [
  "siphasher",
 ]
 
-[[package]]
-name = "pin-project"
-version = "0.4.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "edc93aeee735e60ecb40cf740eb319ff23eab1c5748abfdb5c180e4ce49f7791"
-dependencies = [
- "pin-project-internal",
-]
-
-[[package]]
-name = "pin-project-internal"
-version = "0.4.17"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e58db2081ba5b4c93bd6be09c40fd36cb9193a8336c384f3b40012e531aa7e40"
-dependencies = [
- "proc-macro2 1.0.17",
- "quote 1.0.6",
- "syn 1.0.27",
-]
-
-[[package]]
-name = "pin-project-lite"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7505eeebd78492e0f6108f7171c4948dbb120ee8119d9d77d0afa5469bef67f"
-
-[[package]]
-name = "pin-utils"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
-
 [[package]]
 name = "pkg-config"
 version = "0.3.17"
@@ -2809,9 +2736,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "98e9e4b82e0ef281812565ea4751049f1bdcdfccda7d3f459f2e138a40c08678"
 dependencies = [
  "proc-macro-error-attr",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "version_check",
 ]
 
@@ -2821,25 +2748,13 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4f5444ead4e9935abd7f27dc51f7e852a0569ac888096d5ec2499470794e2e53"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "syn-mid",
  "version_check",
 ]
 
-[[package]]
-name = "proc-macro-hack"
-version = "0.5.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e0456befd48169b9f13ef0f0ad46d492cf9d2dbb918bcf38e01eed4ce3ec5e4"
-
-[[package]]
-name = "proc-macro-nested"
-version = "0.1.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e946095f9d3ed29ec38de908c22f95d9ac008e424c7bcae54c75a79c527c694"
-
 [[package]]
 name = "proc-macro2"
 version = "0.4.30"
@@ -2851,9 +2766,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.17"
+version = "1.0.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1502d12e458c49a4c9cbff560d0fe0060c252bc29799ed94ca2ed4bb665a0101"
+checksum = "beae6331a816b1f65d04c45b078fd8e6c93e8071771f41b8163255bbd8d7c8fa"
 dependencies = [
  "unicode-xid 0.2.0",
 ]
@@ -2883,6 +2798,19 @@ dependencies = [
  "cc",
 ]
 
+[[package]]
+name = "publicsuffix"
+version = "1.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3bbaa49075179162b49acac1c6aa45fb4dafb5f13cf6794276d77bc7fd95757b"
+dependencies = [
+ "error-chain",
+ "idna 0.2.0",
+ "lazy_static",
+ "regex",
+ "url 2.1.1",
+]
+
 [[package]]
 name = "pulldown-cmark"
 version = "0.6.1"
@@ -2902,7 +2830,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3e142c3b8f49d2200605ee6ba0b1d757310e9e7a72afe78c36ee2ef67300ee00"
 dependencies = [
  "bitflags",
- "getopts",
  "memchr",
  "unicase",
 ]
@@ -2940,7 +2867,7 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "54a21852a652ad6f610c9510194f398ff6f8692e334fd1145fed931f7fbe44ea"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
 ]
 
 [[package]]
@@ -2966,6 +2893,25 @@ dependencies = [
  "rustc-ap-rustc_span 659.0.0",
 ]
 
+[[package]]
+name = "rand"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d71dacdc3c88c1fde3885a3be3fbab9f35724e6ce99467f7d9c5026132184ca"
+dependencies = [
+ "autocfg 0.1.7",
+ "libc",
+ "rand_chacha 0.1.1",
+ "rand_core 0.4.2",
+ "rand_hc 0.1.0",
+ "rand_isaac",
+ "rand_jitter",
+ "rand_os",
+ "rand_pcg 0.1.2",
+ "rand_xorshift 0.1.1",
+ "winapi 0.3.8",
+]
+
 [[package]]
 name = "rand"
 version = "0.7.3"
@@ -2974,10 +2920,20 @@ checksum = "6a6b1679d49b24bbfe0c803429aa1874472f50d9b363131f0e89fc356b544d03"
 dependencies = [
  "getrandom",
  "libc",
- "rand_chacha",
- "rand_core",
- "rand_hc",
- "rand_pcg",
+ "rand_chacha 0.2.2",
+ "rand_core 0.5.1",
+ "rand_hc 0.2.0",
+ "rand_pcg 0.2.1",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "556d3a1ca6600bfcbab7c7c91ccb085ac7fbbcd70e008a98742e7847f4f7bcef"
+dependencies = [
+ "autocfg 0.1.7",
+ "rand_core 0.3.1",
 ]
 
 [[package]]
@@ -2987,9 +2943,24 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f4c8ed856279c9737206bf725bf36935d8666ead7aa69b52be55af369d193402"
 dependencies = [
  "ppv-lite86",
- "rand_core",
+ "rand_core 0.5.1",
 ]
 
+[[package]]
+name = "rand_core"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a6fdeb83b075e8266dcc8762c22776f6877a63111121f5f8c7411e5be7eed4b"
+dependencies = [
+ "rand_core 0.4.2",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c33a3c44ca05fa6f1807d8e6743f3824e8509beca625669633be0acbdf509dc"
+
 [[package]]
 name = "rand_core"
 version = "0.5.1"
@@ -2999,13 +2970,66 @@ dependencies = [
  "getrandom",
 ]
 
+[[package]]
+name = "rand_hc"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b40677c7be09ae76218dc623efbf7b18e34bced3f38883af07bb75630a21bc4"
+dependencies = [
+ "rand_core 0.3.1",
+]
+
 [[package]]
 name = "rand_hc"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
 dependencies = [
- "rand_core",
+ "rand_core 0.5.1",
+]
+
+[[package]]
+name = "rand_isaac"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ded997c9d5f13925be2a6fd7e66bf1872597f759fd9dd93513dd7e92e5a5ee08"
+dependencies = [
+ "rand_core 0.3.1",
+]
+
+[[package]]
+name = "rand_jitter"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1166d5c91dc97b88d1decc3285bb0a99ed84b05cfd0bc2341bdf2d43fc41e39b"
+dependencies = [
+ "libc",
+ "rand_core 0.4.2",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "rand_os"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
+dependencies = [
+ "cloudabi",
+ "fuchsia-cprng",
+ "libc",
+ "rand_core 0.4.2",
+ "rdrand",
+ "winapi 0.3.8",
+]
+
+[[package]]
+name = "rand_pcg"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
+dependencies = [
+ "autocfg 0.1.7",
+ "rand_core 0.4.2",
 ]
 
 [[package]]
@@ -3014,7 +3038,16 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "16abd0c1b639e9eb4d7c50c0b8100b0d0f849be2349829c740fe8e6eb4816429"
 dependencies = [
- "rand_core",
+ "rand_core 0.5.1",
+]
+
+[[package]]
+name = "rand_xorshift"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
+dependencies = [
+ "rand_core 0.3.1",
 ]
 
 [[package]]
@@ -3023,7 +3056,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77d416b86801d23dde1aa643023b775c3a462efc0ed96443add11546cdf1dca8"
 dependencies = [
- "rand_core",
+ "rand_core 0.5.1",
 ]
 
 [[package]]
@@ -3032,7 +3065,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a9fcdd2e881d02f1d9390ae47ad8e5696a9e4be7b547a1da2afbc61973217004"
 dependencies = [
- "rand_core",
+ "rand_core 0.5.1",
 ]
 
 [[package]]
@@ -3053,12 +3086,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08a89b46efaf957e52b18062fb2f4660f8b8a4dde1807ca002690868ef2c85a9"
 dependencies = [
  "crossbeam-deque",
- "crossbeam-queue 0.2.1",
+ "crossbeam-queue 0.2.2",
  "crossbeam-utils 0.7.2",
  "lazy_static",
  "num_cpus",
 ]
 
+[[package]]
+name = "rdrand"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
+dependencies = [
+ "rand_core 0.3.1",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.1.56"
@@ -3078,9 +3120,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.3.8"
+version = "1.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "226ddd1197737bcb937489322ec1b9edaac1709d46792886e70f2113923585a6"
+checksum = "9c3780fcf44b193bc4d09f36d2a3c87b251da4a046c87795a0d35f4f927ad8e6"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -3113,55 +3155,38 @@ dependencies = [
 
 [[package]]
 name = "reqwest"
-version = "0.10.4"
+version = "0.9.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "02b81e49ddec5109a9dcfc5f2a317ff53377c915e9ae9d4f2fb50914b85614e2"
+checksum = "f88643aea3c1343c804950d7bf983bd2067f5ab59db6d613a08e05572f2714ab"
 dependencies = [
- "base64",
- "bytes 0.5.4",
+ "base64 0.10.1",
+ "bytes",
+ "cookie",
+ "cookie_store",
  "encoding_rs",
- "futures-core",
- "futures-util",
+ "flate2",
+ "futures",
  "http",
- "http-body",
  "hyper",
- "hyper-rustls",
- "js-sys",
- "lazy_static",
+ "hyper-tls",
  "log",
  "mime",
  "mime_guess",
- "percent-encoding 2.1.0",
- "pin-project-lite",
- "rustls",
+ "native-tls",
  "serde",
+ "serde_json",
  "serde_urlencoded",
  "time",
- "tokio 0.2.21",
- "tokio-rustls",
- "url 2.1.1",
- "wasm-bindgen",
- "wasm-bindgen-futures",
- "web-sys",
- "webpki-roots",
+ "tokio",
+ "tokio-executor",
+ "tokio-io",
+ "tokio-threadpool",
+ "tokio-timer",
+ "url 1.7.2",
+ "uuid",
  "winreg",
 ]
 
-[[package]]
-name = "ring"
-version = "0.16.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "703516ae74571f24b465b4a1431e81e2ad51336cb0ded733a55a1aa3eccac196"
-dependencies = [
- "cc",
- "libc",
- "once_cell",
- "spin",
- "untrusted",
- "web-sys",
- "winapi 0.3.8",
-]
-
 [[package]]
 name = "rls"
 version = "1.41.0"
@@ -3185,7 +3210,7 @@ dependencies = [
  "num_cpus",
  "ordslice",
  "racer",
- "rand",
+ "rand 0.7.3",
  "rayon",
  "regex",
  "rls-analysis",
@@ -3202,7 +3227,7 @@ dependencies = [
  "serde_ignored",
  "serde_json",
  "tempfile",
- "tokio 0.1.22",
+ "tokio",
  "tokio-process",
  "tokio-timer",
  "toml",
@@ -3258,11 +3283,11 @@ dependencies = [
  "failure",
  "futures",
  "log",
- "rand",
+ "rand 0.7.3",
  "rls-data",
  "rls-ipc",
  "serde",
- "tokio 0.1.22",
+ "tokio",
 ]
 
 [[package]]
@@ -3290,7 +3315,7 @@ version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2bc8af4bda8e1ff4932523b94d3dd20ee30a87232323eda55903ffd71d2fb017"
 dependencies = [
- "base64",
+ "base64 0.11.0",
  "blake2b_simd",
  "constant_time_eq",
  "crossbeam-utils 0.7.2",
@@ -3301,8 +3326,8 @@ name = "rustbook"
 version = "0.1.0"
 dependencies = [
  "clap",
- "codespan 0.5.0",
- "codespan-reporting 0.5.0",
+ "codespan",
+ "codespan-reporting",
  "failure",
  "mdbook",
  "mdbook-linkcheck",
@@ -3685,9 +3710,9 @@ version = "651.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3226b5ec864312a5d23eb40a5d621ee06bdc0754228d20d6eb76d4ddc4f2d4a1"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "synstructure",
 ]
 
@@ -3697,9 +3722,9 @@ version = "659.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d104115a689367d2e0bcd99f37e0ebd6b9c8c78bab0d9cbea5bae86323601b5"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "synstructure",
 ]
 
@@ -3942,14 +3967,14 @@ name = "rustc-workspace-hack"
 version = "1.0.0"
 dependencies = [
  "crossbeam-utils 0.7.2",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
  "serde",
  "serde_json",
  "smallvec 0.6.13",
  "smallvec 1.4.0",
  "syn 0.15.44",
- "syn 1.0.27",
+ "syn 1.0.30",
  "url 2.1.1",
  "winapi 0.3.8",
 ]
@@ -4263,7 +4288,7 @@ version = "0.0.0"
 dependencies = [
  "graphviz",
  "log",
- "rand",
+ "rand 0.7.3",
  "rustc_ast",
  "rustc_data_structures",
  "rustc_fs_util",
@@ -4387,9 +4412,9 @@ dependencies = [
 name = "rustc_macros"
 version = "0.1.0"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "synstructure",
 ]
 
@@ -4823,10 +4848,10 @@ dependencies = [
 name = "rustfmt-config_proc_macro"
 version = "0.2.0"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
  "serde",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -4835,9 +4860,9 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b19836fdb238d3f321427a41b87e6c2e9ac132f209d1dc55c55fae8d1df3996f"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -4919,36 +4944,11 @@ dependencies = [
  "unicode_categories",
 ]
 
-[[package]]
-name = "rustls"
-version = "0.17.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c0d4a31f5d68413404705d6982529b0e11a9aacd4839d1d6222ee3b8cb4015e1"
-dependencies = [
- "base64",
- "log",
- "ring",
- "sct",
- "webpki",
-]
-
-[[package]]
-name = "rustls-native-certs"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a75ffeb84a6bd9d014713119542ce415db3a3e4748f0bfce1e1416cd224a23a5"
-dependencies = [
- "openssl-probe",
- "rustls",
- "schannel",
- "security-framework",
-]
-
 [[package]]
 name = "ryu"
-version = "1.0.4"
+version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed3d612bc64430efeb3f7ee6ef26d590dce0c43249217bddc62112540c7941e1"
+checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 
 [[package]]
 name = "same-file"
@@ -4981,16 +4981,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
 
-[[package]]
-name = "sct"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3042af939fca8c3453b7af0f1c66e533a15a86169e39de2657310ade8f98d3c"
-dependencies = [
- "ring",
- "untrusted",
-]
-
 [[package]]
 name = "security-framework"
 version = "0.4.4"
@@ -5032,22 +5022,22 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.110"
+version = "1.0.111"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99e7b308464d16b56eba9964e4972a3eee817760ab60d88c3f86e1fecb08204c"
+checksum = "c9124df5b40cbd380080b2cc6ab894c040a3070d995f5c9dc77e18c34a8ae37d"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.110"
+version = "1.0.111"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "818fbf6bfa9a42d3bfcaca148547aa00c7b915bec71d1757aa2d44ca68771984"
+checksum = "3f2c3ac8e6ca1e9c80b8be1023940162bf81ae3cffbb1809474152f2ce1eb250"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -5076,21 +5066,21 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cd02c7587ec314570041b2754829f84d873ced14a96d1fd1823531e11db40573"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
 name = "serde_urlencoded"
-version = "0.6.1"
+version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ec5d77e2d4c73717816afac02670d5c4f534ea95ed430442cad02e7a6e32c97"
+checksum = "642dd69105886af2efd227f75a520ec9b44a820d65bc133a9131f7d229fd165a"
 dependencies = [
  "dtoa",
  "itoa",
  "serde",
- "url 2.1.1",
+ "url 1.7.2",
 ]
 
 [[package]]
@@ -5184,12 +5174,6 @@ dependencies = [
  "winapi 0.3.8",
 ]
 
-[[package]]
-name = "spin"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
-
 [[package]]
 name = "stable_deref_trait"
 version = "1.1.1"
@@ -5226,11 +5210,20 @@ dependencies = [
  "panic_abort",
  "panic_unwind",
  "profiler_builtins",
- "rand",
+ "rand 0.7.3",
  "unwind",
  "wasi",
 ]
 
+[[package]]
+name = "string"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d24114bfcceb867ca7f71a0d3fe45d45619ec47a6fbfa98cb14e14250bfa5d6d"
+dependencies = [
+ "bytes",
+]
+
 [[package]]
 name = "string_cache"
 version = "0.8.0"
@@ -5252,7 +5245,7 @@ checksum = "f24c8e5e19d22a726626f1a5e16fe15b132dcf21d10177fa5a45ce7962996b97"
 dependencies = [
  "phf_generator",
  "phf_shared",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
 ]
 
@@ -5290,9 +5283,9 @@ checksum = "d239ca4b13aee7a2142e6795cbd69e457665ff8037aed33b3effdc430d2f927a"
 dependencies = [
  "heck",
  "proc-macro-error",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -5308,9 +5301,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "87c85aa3f8ea653bfd3ddf25f7ee357ee4d204731f6aa9ad04002306f6e2774c"
 dependencies = [
  "heck",
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -5326,11 +5319,11 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "1.0.27"
+version = "1.0.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef781e621ee763a2a40721a8861ec519cb76966aee03bb5d00adb6a31dc1c1de"
+checksum = "93a56fabc59dce20fe48b6c832cc249c713e7ed88fa28b0ee0a3bfcaae5fe4e2"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
  "unicode-xid 0.2.0",
 ]
@@ -5341,9 +5334,9 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7be3539f6c128a931cf19dcee741c1af532c7fd387baa739c03dd2e96479338a"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -5352,9 +5345,9 @@ version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67656ea1dc1b41b1451851562ea232ec2e5a80242139f7e679ceccfb5d61f545"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
  "unicode-xid 0.2.0",
 ]
 
@@ -5378,7 +5371,7 @@ checksum = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
 dependencies = [
  "cfg-if",
  "libc",
- "rand",
+ "rand 0.7.3",
  "redox_syscall",
  "remove_dir_all",
  "winapi 0.3.8",
@@ -5481,9 +5474,9 @@ version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "893582086c2f98cde18f906265a65b5030a074b1046c674ae898be6519a7f479"
 dependencies = [
- "proc-macro2 1.0.17",
+ "proc-macro2 1.0.18",
  "quote 1.0.6",
- "syn 1.0.27",
+ "syn 1.0.30",
 ]
 
 [[package]]
@@ -5521,7 +5514,7 @@ version = "0.1.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a09c0b5bb588872ab2f09afa13ee6e9dac11e10a0ec9e8e3ba39a5a5d530af6"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "mio",
  "num_cpus",
@@ -5540,21 +5533,14 @@ dependencies = [
 ]
 
 [[package]]
-name = "tokio"
-version = "0.2.21"
+name = "tokio-buf"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d099fa27b9702bed751524694adbe393e18b36b204da91eb1cbbbbb4a5ee2d58"
+checksum = "8fb220f46c53859a4b7ec083e41dec9778ff0b1851c0942b211edb89e0ccdc46"
 dependencies = [
- "bytes 0.5.4",
- "fnv",
- "futures-core",
- "iovec",
- "lazy_static",
- "memchr",
- "mio",
- "num_cpus",
- "pin-project-lite",
- "slab",
+ "bytes",
+ "either",
+ "futures",
 ]
 
 [[package]]
@@ -5563,7 +5549,7 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "25b2998660ba0e70d18684de5d06b70b70a3a747469af9dea7618cc59e75976b"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "tokio-io",
 ]
@@ -5605,7 +5591,7 @@ version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57fc868aae093479e3131e3d165c93b1c7474109d13c90ec0dda2a1bbfff0674"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "log",
 ]
@@ -5616,11 +5602,11 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9d282d483052288b2308ba5ee795f5673b159c9bdf63c385a05609da782a5eae"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "mio",
  "mio-named-pipes",
- "tokio 0.1.22",
+ "tokio",
 ]
 
 [[package]]
@@ -5661,18 +5647,6 @@ dependencies = [
  "tokio-sync",
 ]
 
-[[package]]
-name = "tokio-rustls"
-version = "0.13.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15cb62a0d2770787abc96e99c1cd98fcf17f94959f3af63ca85bdfb203f051b4"
-dependencies = [
- "futures-core",
- "rustls",
- "tokio 0.2.21",
- "webpki",
-]
-
 [[package]]
 name = "tokio-service"
 version = "0.1.0"
@@ -5715,7 +5689,7 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "98df18ed66e3b72e742f185882a9e201892407957e45fbff8da17ae7a7c51f72"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "iovec",
  "mio",
@@ -5730,7 +5704,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df720b6581784c118f0eb4310796b12b1d242a7eb95f716a8367855325c25f89"
 dependencies = [
  "crossbeam-deque",
- "crossbeam-queue 0.2.1",
+ "crossbeam-queue 0.2.2",
  "crossbeam-utils 0.7.2",
  "futures",
  "lazy_static",
@@ -5758,7 +5732,7 @@ version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2a0b10e610b39c38b031a2fcab08e4b82f16ece36504988dcbd81dbba650d82"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "log",
  "mio",
@@ -5773,7 +5747,7 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5076db410d6fdc6523df7595447629099a1fdc47b3d9f896220780fa48faf798"
 dependencies = [
- "bytes 0.4.12",
+ "bytes",
  "futures",
  "iovec",
  "libc",
@@ -5785,20 +5759,6 @@ dependencies = [
  "tokio-reactor",
 ]
 
-[[package]]
-name = "tokio-util"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be8242891f2b6cbef26a2d7e8605133c2c554cd35b3e4948ea892d6d68436499"
-dependencies = [
- "bytes 0.5.4",
- "futures-core",
- "futures-sink",
- "log",
- "pin-project-lite",
- "tokio 0.2.21",
-]
-
 [[package]]
 name = "toml"
 version = "0.5.6"
@@ -5834,18 +5794,21 @@ dependencies = [
  "syn 0.15.44",
 ]
 
-[[package]]
-name = "tower-service"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e987b6bf443f4b5b3b6f38704195592cca41c5bb7aedd3c3693c7081f8289860"
-
 [[package]]
 name = "try-lock"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e604eb7b43c06650e854be16a2a03155743d3752dd1c943f6829e26b7a36e382"
 
+[[package]]
+name = "try_from"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "283d3b89e1368717881a9d51dad843cc435380d8109c9e47d38780a324698d8b"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "typenum"
 version = "1.12.0"
@@ -5961,12 +5924,6 @@ dependencies = [
  "tidy",
 ]
 
-[[package]]
-name = "untrusted"
-version = "0.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
-
 [[package]]
 name = "unwind"
 version = "0.0.0"
@@ -6013,11 +5970,20 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8772a4ccbb4e89959023bc5b7cb8623a795caa7092d99f3aa9501b9484d4557d"
 
+[[package]]
+name = "uuid"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90dbc611eb48397705a6b0f6e917da23ae517e4d127123d2cf7674206627d32a"
+dependencies = [
+ "rand 0.6.5",
+]
+
 [[package]]
 name = "vcpkg"
-version = "0.2.8"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fc439f2794e98976c88a2a2dafce96b930fe8010b0a256b3c2199a773933168"
+checksum = "55d1e41d56121e07f1e223db0a4def204e45c85425f6a16d462fd07c8d10d74c"
 
 [[package]]
 name = "vec_map"
@@ -6063,10 +6029,11 @@ dependencies = [
 
 [[package]]
 name = "want"
-version = "0.3.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ce8a968cb1cd110d136ff8b819a556d6fb6d919363c61534f6860c7eb172ba0"
+checksum = "b6395efa4784b027708f7451087e647ec73cc74f5d9bc2e418404248d679a230"
 dependencies = [
+ "futures",
  "log",
  "try-lock",
 ]
@@ -6082,103 +6049,6 @@ dependencies = [
  "rustc-std-workspace-core",
 ]
 
-[[package]]
-name = "wasm-bindgen"
-version = "0.2.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c2dc4aa152834bc334f506c1a06b866416a8b6697d5c9f75b9a689c8486def0"
-dependencies = [
- "cfg-if",
- "serde",
- "serde_json",
- "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ded84f06e0ed21499f6184df0e0cb3494727b0c5da89534e0fcc55c51d812101"
-dependencies = [
- "bumpalo",
- "lazy_static",
- "log",
- "proc-macro2 1.0.17",
- "quote 1.0.6",
- "syn 1.0.27",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-futures"
-version = "0.4.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64487204d863f109eb77e8462189d111f27cb5712cc9fdb3461297a76963a2f6"
-dependencies = [
- "cfg-if",
- "js-sys",
- "wasm-bindgen",
- "web-sys",
-]
-
-[[package]]
-name = "wasm-bindgen-macro"
-version = "0.2.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "838e423688dac18d73e31edce74ddfac468e37b1506ad163ffaf0a46f703ffe3"
-dependencies = [
- "quote 1.0.6",
- "wasm-bindgen-macro-support",
-]
-
-[[package]]
-name = "wasm-bindgen-macro-support"
-version = "0.2.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3156052d8ec77142051a533cdd686cba889537b213f948cd1d20869926e68e92"
-dependencies = [
- "proc-macro2 1.0.17",
- "quote 1.0.6",
- "syn 1.0.27",
- "wasm-bindgen-backend",
- "wasm-bindgen-shared",
-]
-
-[[package]]
-name = "wasm-bindgen-shared"
-version = "0.2.63"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9ba19973a58daf4db6f352eda73dc0e289493cd29fb2632eb172085b6521acd"
-
-[[package]]
-name = "web-sys"
-version = "0.3.40"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b72fe77fd39e4bd3eaa4412fd299a0be6b3dfe9d2597e2f1c20beb968f41d17"
-dependencies = [
- "js-sys",
- "wasm-bindgen",
-]
-
-[[package]]
-name = "webpki"
-version = "0.21.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1f50e1972865d6b1adb54167d1c8ed48606004c2c9d0ea5f1eeb34d95e863ef"
-dependencies = [
- "ring",
- "untrusted",
-]
-
-[[package]]
-name = "webpki-roots"
-version = "0.18.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "91cd5736df7f12a964a5067a12c62fa38e1bd8080aff1f80bc29be7c80d19ab4"
-dependencies = [
- "webpki",
-]
-
 [[package]]
 name = "winapi"
 version = "0.2.8"
@@ -6279,7 +6149,7 @@ checksum = "59893318ba3ad2b704498c7761214a10eaf42c5f838bce9fc0145bf2ba658cfa"
 dependencies = [
  "lazy_static",
  "thiserror",
- "yaml-rust 0.4.3",
+ "yaml-rust 0.4.4",
 ]
 
 [[package]]
@@ -6290,9 +6160,9 @@ checksum = "e66366e18dc58b46801afbf2ca7661a9f59cc8c5962c29892b6039b4f86fa992"
 
 [[package]]
 name = "yaml-rust"
-version = "0.4.3"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65923dd1784f44da1d2c3dbbc5e822045628c590ba72123e1c73d3c230c4434d"
+checksum = "39f0c922f1a334134dc2f7a8b67dc5d25f0735263feec974345ff706bcf20b0d"
 dependencies = [
  "linked-hash-map",
 ]
diff --git a/src/tools/rustbook/Cargo.toml b/src/tools/rustbook/Cargo.toml
index ff41197faa1a6..f7edc0d968d2b 100644
--- a/src/tools/rustbook/Cargo.toml
+++ b/src/tools/rustbook/Cargo.toml
@@ -11,10 +11,10 @@ linkcheck = ["mdbook-linkcheck", "codespan-reporting", "codespan"]
 [dependencies]
 clap = "2.25.0"
 failure = "0.1"
-mdbook-linkcheck = { version = "0.5.0", optional = true }
+mdbook-linkcheck = { version = "=0.5.0", optional = true }
 # Keep in sync with mdbook-linkcheck.
-codespan = { version = "0.5", optional = true }
-codespan-reporting = { version = "0.5", optional = true }
+codespan = { version = "=0.5", optional = true }
+codespan-reporting = { version = "=0.5", optional = true }
 
 
 # A noop dependency that changes in the Rust repository, it's a bit of a hack.