Update django-compressor to 2.3

[pyup-bot]

This PR updates django-compressor from 2.2 to 2.3.

Changelog

2.3

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

`Full Changelog <https://github.com/django-compressor/django-compressor/compare/2.2...2.3>`_

- Drop support for Django 1.8, 1.9 and 1.10
- Add support for Django 2.1 and 2.2, as well as Python 3.7
- Update all dependencies. This required minor code changes, you might need to update some optional dependencies if you use any
- Allow the mixed use of JS/CSS in Sekizai's templatetags `{% addtoblock "js" %}` and `{% addtoblock "css" %}` (891)
- Allow the implementation of new types other than css and js. (900)
- Update jinja2 extension to behave similar to the django tag (899)
- Fix crash in offline compression when child nodelist is None, again (605)
- Support STATIC_URL and COMPRESS_URL being string-like objects
- Improve compress command memory usage (870)
- Ensure generated file always contains a base name (775)
- Add BrotliCompressorFileStorage (867)

Links

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

[codecov]

Codecov Report

Merging #116 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #116   +/-   ##
=======================================
  Coverage   98.85%   98.85%           
=======================================
  Files          35       35           
  Lines         522      522           
=======================================
  Hits          516      516           
  Misses          6        6

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[pyup-bot]

Closing this in favor of #182