Update six to 1.14.0

[pyup-bot]

This PR updates six from 1.10.0 to 1.14.0.

Changelog

1.14.0

------

- Issue 288, pull request 289: Add `six.assertNotRegex`.

- Issue 317: `six.moves._dummy_thread` now points to the `_thread` module on
Python 3.9+. Python 3.7 and later requires threading and deprecated the
`_dummy_thread` module.

- Issue 308, pull request 314: Remove support for Python 2.6 and Python 3.2.

- Issue 250, issue 165, pull request 251: `six.wraps` now ignores missing
attributes. This follows the Python 3.2+ standard library behavior.

1.13.0

------

- Issue 298, pull request 299: Add `six.moves.dbm_ndbm`.

- Issue 155: Add `six.moves.collections_abc`, which aliases the `collections`
module on Python 2-3.2 and the `collections.abc` on Python 3.3 and greater.

- Pull request 304: Re-add distutils fallback in `setup.py`.

- Pull request 305: On Python 3.7, `with_metaclass` supports classes using PEP
560 features.

1.12.0

------

- Issue 259, pull request 260: `six.add_metaclass` now preserves
`__qualname__` from the original class.

- Pull request 204: Add `six.ensure_binary`, `six.ensure_text`, and
`six.ensure_str`.

1.11.0

------

- Pull request 178: `with_metaclass` now properly proxies `__prepare__` to the
underlying metaclass.

- Pull request 191: Allow `with_metaclass` to work with metaclasses implemented
in C.

- Pull request 203: Add parse_http_list and parse_keqv_list to moved
urllib.request.

- Pull request 172 and issue 171: Add unquote_to_bytes to moved urllib.parse.

- Pull request 167: Add `six.moves.getoutput`.

- Pull request 80: Add `six.moves.urllib_parse.splitvalue`.

- Pull request 75: Add `six.moves.email_mime_image`.

- Pull request 72: Avoid creating reference cycles through tracebacks in
`reraise`.

Links

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

[codecov-io]

Codecov Report

Merging #155 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #155   +/-   ##
=====================================
  Coverage      30%    30%           
=====================================
  Files           3      3           
  Lines          10     10           
=====================================
  Hits            3      3           
  Misses          7      7

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[pyup-bot]

Closing this in favor of #177