Bump coveralls from 1.8.1 to 1.11.0

Bumps [coveralls](https://github.com/coveralls-clients/coveralls-python) from 1.8.1 to 1.11.0.
- [Release notes](https://github.com/coveralls-clients/coveralls-python/releases)
- [Changelog](https://github.com/coveralls-clients/coveralls-python/blob/master/CHANGELOG.md)
- [Commits](TheKevJames/coveralls-python@1.8.1...1.11.0)

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