Bump pytest-cov from 4.0.0 to 6.0.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 4.0.0 to 6.0.0.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v4.0.0...v6.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

requirements-dev.txt

@@ -1,4 +1,4 @@
 flake8==6.0.0
 pytest==7.2.1
-pytest-cov==4.0.0
+pytest-cov==6.0.0
 wheel==0.38.4