Update six to 1.16.0

[pyup-bot]

This PR updates six from 1.15.0 to 1.16.0.

Changelog

1.16.0

------

- Pull request 343, issue 341, pull request 349: Port _SixMetaPathImporter to
Python 3.10.

Links

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

[codecov-commenter]

Codecov Report

Merging #54 (9b86b3d) into master (2a82501) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #54   +/-   ##
=======================================
  Coverage   30.00%   30.00%           
=======================================
  Files           3        3           
  Lines          10       10           
=======================================
  Hits            3        3           
  Misses          7        7           

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