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: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -1,5 +1,5 @@
 cfgv==3.4.0
-distlib==0.3.8
+distlib==0.3.9
 filelock==3.16.1
 identify==2.6.1
 nodeenv==1.9.1