Update coveralls to 2.1.1

[pyup-bot]

This PR updates coveralls from 2.0.0 to 2.1.1.

Changelog

2.1.1

Bug Fixes

*  fix unhashable CoverallsException (230) ([aa55335d](aa55335d))
This fixes a regression introduced in v2.1.0 which affected (at least) any
Python 3.5 installations.


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2.1.0

Features

* **cli**:  add new `--finish` flag for finalizing parallel builds (277) ([f597109b](f597109b))

Bug Fixes

* **github:**  fix Github Actions support (227) ([f597109b](f597109b))

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Links

• PyPI: https://pypi.org/project/coveralls
• Changelog: https://pyup.io/changelogs/coveralls/
• Repo: http://github.com/coveralls-clients/coveralls-python

[pyup-bot]

Closing this in favor of #64