Bump distlib from 0.3.8 to 0.3.9

Bumps [distlib](https://github.com/pypa/distlib) from 0.3.8 to 0.3.9.
- [Release notes](https://github.com/pypa/distlib/releases)
- [Changelog](https://github.com/pypa/distlib/blob/master/CHANGES.rst)
- [Commits](pypa/distlib@0.3.8...0.3.9)

---
updated-dependencies:
- dependency-name: distlib
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]