Upgrade crossbeam-channel to 0.4.2

Author: rylev

Cargo.lock

@@ -21,7 +21,7 @@ semver = "0.9"
 reqwest = { version = "0.10", features = ["json"] }
 xz2 = "0.1.3"
 tar = "0.4"
-crossbeam-channel = "0.3.8"
+crossbeam-channel = "0.4.2"
 bincode = "1"
 snap = "1.0"
 hashbrown = "0.7.0"