Bump cargo

Mark-Simulacrum · Mark-Simulacrum · commit 38148199511e · 2020-07-23T10:16:33.000-04:00
This is not a user-visible change as Cargo's library API is not exposed by Rust,
but this way the version in 1.45.1 will appropriately match with published Cargo
0.46.1.
diff --git a/Cargo.lock b/Cargo.lock
@@ -284,7 +284,7 @@ checksum = "716960a18f978640f25101b5cbf1c6f6b0d3192fab36a2d98ca96f0ecbe41010"
 
 [[package]]
 name = "cargo"
-version = "0.46.0"
+version = "0.46.1"
 dependencies = [
  "anyhow",
  "atty",
diff --git a/src/tools/cargo b/src/tools/cargo
@@ -1 +1 @@
-Subproject commit 744bd1fbb666f33b20b09d5bacc5047957c8ed42
+Subproject commit f242df6edb897f6f69d393a22bb257f5af0f52d0
