Prepare for the next release

- crossbeam-channel 0.5.11 -> 0.5.12

Author: taiki-e

crossbeam-channel/CHANGELOG.md

@@ -1,3 +1,7 @@
+# Version 0.5.12
+
+- Fix memory leak in unbounded channel. (#1084)
+
 # Version 0.5.11
 
 - Remove dependency on `cfg-if`. (#1072)

crossbeam-channel/Cargo.toml

@@ -4,7 +4,7 @@ name = "crossbeam-channel"
 # - Update CHANGELOG.md
 # - Update README.md (when increasing major or minor version)
 # - Run './tools/publish.sh crossbeam-channel <version>'
-version = "0.5.11"
+version = "0.5.12"
 edition = "2021"
 rust-version = "1.60"
 license = "MIT OR Apache-2.0"