Bump six from 1.14.0 to 1.16.0

Bumps six from 1.14.0 to 1.16.0.

Changelog

Sourced from six's changelog.

1.16.0

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

1.15.0

• Pull request #331: Optimize six.ensure_str and six.ensure_binary.

Commits

• 65486e4 Use API token for PyPI upload auth.
• 1a4f325 six 1.16.0
• 64601c7 Add Pierre Grimaud to CONTRIBUTORS.
• a4feaa4 fix typo in CHANGES (#353)
• 3054461 Add changelog for #343.
• 2591629 Implement find_spec() for _SixMetaPathImporter. (#352)
• 42636b1 Fix typo in Changelog: itmes -> items. (#350)
• ae22dcf Add changelog for meta path change.
• e51553a Port _SixMetaPathImporter to Python 3.10. (#343)
• c2a5935 Don't install typing. (#344)
• Additional commits viewable in compare view