chore(deps): bump bytes from 1.1.0 to 1.2.1 (#206)

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](tokio-rs/bytes@v1.1.0...v1.2.1)

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

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