Bump distlib from 0.3.7 to 0.3.8

Bumps [distlib](https://github.com/pypa/distlib) from 0.3.7 to 0.3.8.
- [Release notes](https://github.com/pypa/distlib/releases)
- [Changelog](https://github.com/pypa/distlib/blob/master/CHANGES.rst)
- [Commits](pypa/distlib@0.3.7...0.3.8)

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

Signed-off-by: dependabot[bot] <[email protected]>