Bump dyn-clone from 1.0.19 to 1.0.20 (#107)

Bumps [dyn-clone](https://github.com/dtolnay/dyn-clone) from 1.0.19 to 1.0.20.
- [Release notes](https://github.com/dtolnay/dyn-clone/releases)
- [Commits](dtolnay/dyn-clone@1.0.19...1.0.20)

---
updated-dependencies:
- dependency-name: dyn-clone
  dependency-version: 1.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]