Bump coveralls from 3.3.0 to 3.3.1 (#185)

Bumps [coveralls](https://github.com/TheKevJames/coveralls-python) from 3.3.0 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](TheKevJames/coveralls-python@3.3.0...3.3.1)

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

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

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

pyproject.toml

@@ -47,7 +47,7 @@ docs = ["Sphinx", "sphinx-rtd-theme", "sphinx-autobuild", "sphinx-copybutton", "
 pytest-pycodestyle = "^2.1"
 pytest-cov = "^3.0.0"
 pytest = "^6.2.5"
-coveralls = "^3.3.0"
+coveralls = "^3.3.1"
 black = "^20.8b1"
 mypy = "^0.910"
 toml = "^0.10.1"