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:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

setup.py

@@ -57,7 +57,7 @@
         "test": [
             "coverage==6.4.4",
             "pytest<7.2",
-            "pytest-cov==3.0.0",
+            "pytest-cov==4.0.0",
             "testfixtures==7.0.0",
             "tox==3.26.0",
             "flake8==5.0.4",