Update django-debug-toolbar to 2.2

[pyup-bot]

This PR updates django-debug-toolbar from 2.1 to 2.2.

Changelog

2.2

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

* Removed support for end of life Django 2.0 and 2.1.
* Added support for Python 3.8.
* Add locals() option for sql panel.
* Added support for Django 3.0

Links

• PyPI: https://pypi.org/project/django-debug-toolbar
• Changelog: https://pyup.io/changelogs/django-debug-toolbar/
• Repo: https://github.com/jazzband/django-debug-toolbar

[coveralls]

Coverage remained the same at 96.719% when pulling 9d9acc2 on pyup-update-django-debug-toolbar-2.1-to-2.2 into 24f2f61 on master.

[pyup-bot]

Closing this in favor of #384