Bump coveralls from 3.3.1 to 4.0.0

Bumps [coveralls](https://github.com/TheKevJames/coveralls-python) from 3.3.1 to 4.0.0.
- [Release notes](https://github.com/TheKevJames/coveralls-python/releases)
- [Changelog](https://github.com/TheKevJames/coveralls-python/blob/master/CHANGELOG.md)
- [Commits](TheKevJames/coveralls-python@3.3.1...4.0.0)

---
updated-dependencies:
- dependency-name: coveralls
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>