Bump coveralls from 3.2.0 to 3.3.1 (#105)

Bumps [coveralls](https://github.com/TheKevJames/coveralls-python) from 3.2.0 to 3.3.1.
- [Release notes](https://github.com/TheKevJames/coveralls-python/releases)
- [Changelog](https://github.com/TheKevJames/coveralls-python/blob/master/CHANGELOG.md)
- [Commits](https://github.com/TheKevJames/coveralls-python/compare/3.2.0...3.3.1)

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

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

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

setup.py

@@ -42,8 +42,8 @@ setup(
     extras_require={
         'dev': [
             'nose==1.3.7',
-            'coveralls==3.2.0',
-            'flake8==3.9.2'
+            'coveralls==3.3.1',
+            'flake8==4.0.1'
         ]
     },
     zip_safe=False