Bump bytes from 1.1.0 to 1.2.1

Bumps [bytes](https://github.com/tokio-rs/bytes) from 1.1.0 to 1.2.1.
- [Release notes](https://github.com/tokio-rs/bytes/releases)
- [Changelog](https://github.com/tokio-rs/bytes/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tokio-rs/bytes/compare/v1.1.0...v1.2.1)

---
updated-dependencies:
- dependency-name: bytes
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Cargo.toml

@@ -14,7 +14,7 @@ pretty_env_logger = "0.4"
 linked-hash-map = "0.5"
 once_cell = "1.14"
 parking_lot = "0.12"
-bytes = { version = "1.1", features = ["serde"] }
+bytes = { version = "1.2", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
 rand = { version = "0.8" }
 gpw = "0.1"