Bump pytest-cov from 3.0.0 to 4.0.0

Bumps [pytest-cov](https://github.com/pytest-dev/pytest-cov) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/pytest-dev/pytest-cov/releases)
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pytest-cov/compare/v3.0.0...v4.0.0)

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

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

requirements-test.txt

@@ -4,7 +4,7 @@ pylint==2.15.0
 pytest==7.1.2
 pytest-aiohttp==1.0.4
 pytest-asyncio==0.19.0
-pytest-cov==3.0.0
+pytest-cov==4.0.0
 pytest-env==0.6.2
 pytest-timeout==2.1.0
 testfixtures==7.0.0