Bump coveralls from 3.0.1 to 3.1.0

Bumps [coveralls](https://github.com/TheKevJames/coveralls-python) from 3.0.1 to 3.1.0.
- [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/3.0.1...3.1.0)

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

setup.py

@@ -42,7 +42,7 @@ setup(
     extras_require={
         'dev': [
             'nose==1.3.7',
-            'coveralls==3.0.1',
+            'coveralls==3.1.0',
             'flake8==3.9.1'
         ]
     },