Update colorama to 0.4.6

[pyup-bot]

This PR updates colorama from 0.4.4 to 0.4.6.

Changelog

0.4.6

* https://github.com/tartley/colorama/pull/139 Add alternative to 'init()',
 called 'just_fix_windows_console'. This fixes many longstanding problems
 with 'init', such as working incorrectly on modern Windows terminals, and
 wonkiness when init gets called multiple times. The intention is that it
 just makes all Windows terminals treat ANSI the same way as other terminals
 do. Many thanks the njsmith for fixing our messes. 
* https://github.com/tartley/colorama/pull/352 Support Windows 10's ANSI/VT
 console. This didn't exist when Colorama was created, and avoiding us
 causing havok there is long overdue. Thanks to segeviner for the initial
 approach, and to njsmith for getting it merged.
* https://github.com/tartley/colorama/pull/338 Internal overhaul of package
 metadata declaration, which abolishes our use of the now heavily
 discouraged setuptools (and hence setup.py, setup.cfg and MANIFEST.in), in
 favor of hatchling (and hence pyproject.toml), generously contributed by
 ofek (author of hatchling). This includes dropping support Python3.5 and
 3.6, which are EOL, and were already dropped from setuptools, so this
 should not affect our users.
* https://github.com/tartley/colorama/pull/353 Attention to detail award to
 LqdBcnAtWork for a spelling fix in demo06

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/