Bump crossbeam-channel to 0.4.1

This also bumps the `rand` `dev-dependency` to `0.7`.
No breaking changes as far as I can tell.

Author: jonhoo

crossbeam-channel/CHANGELOG.md

@@ -1,3 +1,9 @@
+# Version 0.4.1
+
+- Bump `rand` dev-dependency to version 0.7.
+- Avoid time drift in `channel::tick`. (#456)
+- Fix unsoundness issues by adopting `MaybeUninit`. (#458)
+
 # Version 0.4.0
 
 - Bump the minimum required version to 1.28.

crossbeam-channel/Cargo.toml

@@ -4,7 +4,7 @@ name = "crossbeam-channel"
 # - Update CHANGELOG.md
 # - Update README.md
 # - Create "crossbeam-channel-X.Y.Z" git tag
-version = "0.4.0"
+version = "0.4.1"
 authors = ["The Crossbeam Project Developers"]
 license = "MIT/Apache-2.0 AND BSD-2-Clause"
 readme = "README.md"
@@ -24,5 +24,5 @@ path = "../crossbeam-utils"
 
 [dev-dependencies]
 num_cpus = "1.10.0"
-rand = "0.6"
+rand = "0.7"
 signal-hook = "0.1.5"