Update dependencies and fix deprecations

* Fix use of deprecated template tag and settings value in new Django
  version
* Bump backoff from 1.11.0 to 1.11.1
* Bump beautifulsoup4 from 4.9.3 to 4.10.0
* Bump celery from 5.1.2 to 5.2.3
* Bump celery-progress from 0.1.1 to 0.1.2
* Bump certifi from 2021.5.30 to 2021.10.8
* Bump coveralls from 3.1.0 to 3.3.1
* Bump django from 3.2.5 to 4.0.1
* Bump django-ckeditor from 6.1.0 to 6.2.0
* Bump django-compressor from 2.4.1 to 3.1
* Bump django-crispy-forms from 1.12.0 to 1.14.0
* Bump django-debug-toolbar from 3.2.1 to 3.2.4
* Bump newrelic from 6.4.4.161 to 7.4.0.172
* Bump pillow from 8.3.1 to 9.0.0
* Bump psycopg2 from 2.9.1 to 2.9.3
* Bump pytest-cov from 2.12.1 to 3.0.0
* Bump pytest-django from 4.4.0 to 4.5.2
* Bump python-dotenv from 0.18.0 to 0.19.2
* Bump pyyaml from 5.4.1 to 6.0
* Bump redis from 3.5.3 to 4.1.2
* Bump requests from 2.26.0 to 2.27.1
* Bump sentry-sdk from 1.3.0 to 1.5.4
* Bump social-auth-app-django from 4.0.0 to 5.0.0
* Bump whitenoise from 5.2.0 to 5.3.0