Update pytest-django to 3.4.4

[pyup-bot]

This PR updates pytest-django from 3.4.3 to 3.4.4.

Changelog

3.4.4

------------------

Bugfixes
^^^^^^^^

* Refine the django.conf module check to see if the settings really are
configured (668).
* Avoid crash after OSError during Django path detection (664).

Features
^^^^^^^^

* Add parameter info to fixture assert_num_queries to display additional message on failure (663).

Docs
^^^^

* Improve doc for django_assert_num_queries/django_assert_max_num_queries.
* Add warning about sqlite specific snippet + fix typos (666).

Misc
^^^^

* MANIFEST.in: include tests for downstream distros (653).
* Ensure that the LICENSE file is included in wheels (665).
* Run black on source.

Links

• PyPI: https://pypi.org/project/pytest-django
• Changelog: https://pyup.io/changelogs/pytest-django/
• Docs: https://pytest-django.readthedocs.io/