Update packaging to 21.0

[pyup-bot]

This PR updates packaging from 20.9 to 21.0.

Changelog

21.0

~~~~~~~~~~~~~~~~~

* `packaging` is now only compatible with Python 3.6 and above.
* Add support for zip files in ``parse_sdist_filename`` (:issue:`429`)

Links

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

[codecov]

Codecov Report

Merging #114 (fff4176) into master (b80bb2f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #114   +/-   ##
=======================================
  Coverage   96.12%   96.12%           
=======================================
  Files          12       12           
  Lines         129      129           
=======================================
  Hits          124      124           
  Misses          5        5           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b80bb2f...fff4176. Read the comment docs.

[pyup-bot]

Closing this in favor of #133