Bump pytest-cov from 3.0.0 to 4.0.0 (soxoj#688)

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](pytest-dev/pytest-cov@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>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

test-requirements.txt

@@ -3,6 +3,6 @@ flake8==5.0.4
 pytest==7.1.3
 pytest-asyncio==0.16.0;python_version<"3.7"
 pytest-asyncio==0.19.0;python_version>="3.7"
-pytest-cov==3.0.0
+pytest-cov==4.0.0
 pytest-httpserver==1.0.6
 pytest-rerunfailures==10.2