Bump coverage from 7.1.0 to 7.2.1

Bumps [coverage](https://github.com/nedbat/coveragepy) from 7.1.0 to 7.2.1.
- [Release notes](https://github.com/nedbat/coveragepy/releases)
- [Changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst)
- [Commits](nedbat/coveragepy@7.1.0...7.2.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,7 +1,7 @@
 mypy==1.1.1
 PyQt6==6.4.2
 pytest==7.2.2
-coverage==7.1.0
+coverage==7.2.1
 pytest-cov==4.0.0
 surrogate==0.1
 requests==2.28.2