Update idna to 3.4

[pyup-bot]

This PR updates idna from 3.2 to 3.4.

Changelog

3.4

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

- Update to Unicode 15.0.0
- Migrate to pyproject.toml for build information (PEP 621)
- Correct another instance where generic exception was raised instead of
IDNAError for malformed input
- Source distribution uses zeroized file ownership for improved
reproducibility

Thanks to Seth Michael Larson for contributions to this release.

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.

Links

• PyPI: https://pypi.org/project/idna
• Changelog: https://pyup.io/changelogs/idna/

[pyup-bot]

Closing this in favor of #123