Update idna to 3.3

[pyup-bot]

This PR updates idna from 3.1 to 3.3.

Changelog

3.3

++++++++++++++++

- Update to Unicode 14.0.0
- Update to in-line type annotations
- Throw IDNAError exception correctly for some malformed input
- Advertise support for Python 3.10
- Improve testing regime on Github
- Fix Russian typo in documentation

Thanks to Jon Defresne, Hugo van Kemenade, Seth Michael Larson,
Patrick Ventuzelo and Boris Verhovsky for contributions to this
release.

3.2

++++++++++++++++

- Add type hints (Thanks, Seth Michael Larson!)
- Remove support for Python 3.4

Links

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

[codecov]

Codecov Report

Merging #128 (378227d) into master (b80bb2f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #128   +/-   ##
=======================================
  Coverage   96.12%   96.12%           
=======================================
  Files          12       12           
  Lines         129      129           
=======================================
  Hits          124      124           
  Misses          5        5           

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[pyup-bot]

Closing this in favor of #218