Bump coverage from 6.4.1 to 6.4.2

Bumps [coverage](https://github.com/nedbat/coveragepy) from 6.4.1 to 6.4.2.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@6.4.1...6.4.2)

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

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

Author: dependabot[bot]

tests/requirements.txt

@@ -1,6 +1,6 @@
 aiohttp==3.8.1
 black==22.6.0
-coverage==6.4.1
+coverage==6.4.2
 docutils==0.18.1
 flake8==4.0.1
 isort==5.10.1