Update django-test-plus to 2.2.3

[pyup-bot]

This PR updates django-test-plus from 1.0.17 to 2.2.3.

Changelog

2.2.3

- Fix bug where email addresses were not created by make_user()

2.2.2

- Fix issue with User creation helper when User model doesn't have a username field
- Improve assertNumQueriesLessThan
- Add assertInContext

2.2.1

- Add Django 4.2 support

2.2.0

- Add support for Django 3.2.

2.1.1

- Add official support for Python 3.9.

2.0.1

- Make assertLoginRequired work for pytest tp fixture.

2.0.0

- Drops Python 2.7, 3.4, and pypy and Django 1.11 support.
- Add Django 3.1 support.

1.4.0

- Added Django 3.0 support
- Misc dependency updates

1.3.1

- Made `make_user` and `get_instance` class based methods, so they can be used
 in `setupUpTestData`. Thanks avelis for the report.

1.3.0

- Add `tp_api` pytest fixture.

1.2.0

- Add optional `msg` argument to assertEqual method. Thanks davitovmasyan.

1.1.1

- Fix premature loading of Django settings under pytest

1.1.0

- Added real pytest fixture support! 
- Stopped testing support below Django 1.11.x. django-test-plus should probably continue to work for a long time, but Django 1.11 is the only pre-2.x version that is still supported so all we are going to worry about.
- Moved README and docs to Markdown

version 1.0.22 - January 9th, 2018

- Fix bug where we did not pass data dictionary to RequestFactory.get() properly

1.0.21

- Add response_204 method

1.0.20

- The Halloween Release!
- Fixes to CI to ensure we really test Django 2.0

1.0.19

- Django 2.0 support
- Dropped support for Python 3.3
- Dropped support for Django < 1.8
- Added APITestCase for better DRF testing

1.0.18

- Allow custom Request objects in get() and post()
- Begin testing against Python 3.6 and Django 1.11

Links

• PyPI: https://pypi.org/project/django-test-plus
• Changelog: https://pyup.io/changelogs/django-test-plus/
• Repo: https://github.com/revsys/django-test-plus/

[pyup-bot]

Closing this in favor of #803