Bump crossbeam-utils from 0.8.3 to 0.8.4

Bumps [crossbeam-utils](https://github.com/crossbeam-rs/crossbeam) from 0.8.3 to 0.8.4.
- [Release notes](https://github.com/crossbeam-rs/crossbeam/releases)
- [Changelog](https://github.com/crossbeam-rs/crossbeam/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crossbeam-rs/crossbeam/compare/crossbeam-utils-0.8.3...crossbeam-utils-0.8.4)

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.lock

@@ -267,9 +267,9 @@ checksum = "8aebca1129a03dc6dc2b127edd729435bbc4a37e1d5f4d7513165089ceb02634"
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7e9d99fa91428effe99c5c6d4634cdeba32b8cf784fc428a2a687f61a952c49"
+checksum = "4feb231f0d4d6af81aed15928e58ecf5816aa62a2393e2c82f46973e92a9a278"
 dependencies = [
  "autocfg",
  "cfg-if 1.0.0",