Bump dyn-hash from 0.2.0 to 0.2.1

Bumps [dyn-hash](https://github.com/dtolnay/dyn-hash) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/dtolnay/dyn-hash/releases)
- [Commits](dtolnay/dyn-hash@0.2.0...0.2.1)

---
updated-dependencies:
- dependency-name: dyn-hash
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]