Update colorama to 0.4.5

[pyup-bot]

This PR updates colorama from 0.4.4 to 0.4.5.

Changelog

0.4.5

* Catch a racy ValueError that could occur on exit.
* Create README-hacking.md, for Colorama contributors.
* Tweak some README unicode characters that don't render correctly on PyPI.
* Fix some tests that were failing on some operating systems.
* Add support for Python 3.9.
* Add support for PyPy3.
* Add support for pickling with the ``dill`` module.

Links

• PyPI: https://pypi.org/project/colorama
• Changelog: https://pyup.io/changelogs/colorama/
• Repo: https://github.com/tartley/colorama

[pyup-bot]

Closing this in favor of #33