Update pip to 22.0.4

[pyup-bot]

This PR updates pip from 22.0.3 to 22.0.4.

Changelog

22.0.4

===================

Deprecations and Removals
-------------------------

- Drop the doctype check, that presented a warning for index pages that use non-compliant HTML 5. (`10903 <https://github.com/pypa/pip/issues/10903>`_)

Vendored Libraries
------------------

- Downgrade distlib to 0.3.3.

Links

• PyPI: https://pypi.org/project/pip
• Changelog: https://pyup.io/changelogs/pip/
• Homepage: https://pip.pypa.io/

[codeclimate]

Code Climate has analyzed commit d85c5e7 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 62.4% (0.0% change).

View more on Code Climate.