Update colorama to 0.4.3

[pyup-bot]

This PR updates colorama from 0.3.9 to 0.4.3.

Changelog

0.4.1

* Fix issue 196: prevent exponential number of calls when calling 'init'
 multiple times. Reported by bbayles and fixed by Delgan.

0.4.0

* Fix issue 142: reset LIGHT_EX colors with RESET_ALL. Reported by Delgan
* Fix issue 147: ignore invalid "erase" ANSI codes. Reported by shin-
* Fix issues 163 and 164: fix stream wrapping under PyCharm. Contributed
 by veleek and Delgan.
* Thanks to jdufresne for various code cleanup and updates to documentation
 and project metadata.
 (pull requests 171, 172, 173, 174, 176, 177, 189, 190, 192)
* 186: added contextlib magic methods to ansitowin32.StreamWrapper.
 Contributed by hoefling.
* Fix issue 131: don't cache stdio handles, since they might be
 closed/changed by fd redirection. This fixes an issue with pytest.
 Contributed by segevfiner.
* 146, 157: Drop support for EOL Python 2.5, 2.6, 3.1, 3.2 and 3.3,
 and add 3.6. Thanks to hugovk.

Links

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