Bump coverage from 6.3 to 6.3.1

Bumps [coverage](https://github.com/nedbat/coveragepy) from 6.3 to 6.3.1.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](coveragepy/coveragepy@6.3...6.3.1)

---
updated-dependencies:
- dependency-name: coverage
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements-dev.txt

@@ -5,7 +5,7 @@ certifi==2021.10.8
 charset-normalizer==2.0.11
 click==8.0.3
 colorama==0.4.4
-coverage==6.3
+coverage==6.3.1
 distlib==0.3.4
 filelock==3.4.2
 flake8==4.0.1