Bump pytest-cov from 3.0.0 to 4.0.0 (#75)

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

requirements-test.txt

@@ -45,7 +45,7 @@ pytest==7.2.1
     #   -r requirements-test.in
     #   pytest-cov
     #   pytest-flake8
-pytest-cov==3.0.0
+pytest-cov==4.0.0
     # via -r requirements-test.in
 pytest-flake8==1.1.1
     # via -r requirements-test.in