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](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] <[email protected]>

requirements-test.txt

@@ -10,7 +10,7 @@ flake8==5.0.4
 isort==5.10.1
 pytest==7.1.3
 pytest-mock==3.8.2
-pytest-cov==3.0.0
+pytest-cov==4.0.0
 py-mini-racer==0.6.0
 
 # Other stuff