Generate extended contract metadata

Cargo.toml

@@ -31,16 +31,19 @@ colored = "1.9"
 toml = "0.5.4"
 cargo-xbuild = "0.5.32"
 rustc_version = "0.2.3"
+blake2 = "0.9.0"
+semver = { version = "0.10.0", features = ["serde"] }
+serde = { version = "1.0", default-features = false, features = ["derive"] }
 serde_json = "1.0"
 tempfile = "3.1.0"
+url = { version = "2.1.1", features = ["serde"] }
 
 # dependencies for optional extrinsics feature
 async-std = { version = "=1.5.0", optional = true }
 sp-core = { version = "2.0.0-rc3", optional = true }
 subxt = { version = "0.9.0", package = "substrate-subxt", optional = true }
 futures = { version = "0.3.2", optional = true }
 hex = { version = "0.4.0", optional = true }
-url = { version = "2.1.1", optional = true }
 
 [build-dependencies]
 anyhow = "1.0"
@@ -54,5 +57,13 @@ wabt = "0.9.2"
 
 [features]
 default = []
-extrinsics = ["sp-core", "subxt", "async-std", "futures", "hex", "url"]
+
+# Enable this for (experimental) commands to deploy, instantiate and call contracts.
+#
+# Disabled by default
+extrinsics = ["sp-core", "subxt", "async-std", "futures", "hex"]
+
+# Enable this to execute long running tests, which usually are only run on the CI server
+#
+# Disabled by default
 test-ci-only = []