Bump django-compressor from 2.2 to 2.4 in /cvat/requirements

[dependabot-preview]

Bumps django-compressor from 2.2 to 2.4.

Changelog

Sourced from django-compressor's changelog.

v2.4 (2019-12-31)

Full Changelog <https://github.com/django-compressor/django-compressor/compare/2.3...2.4>_

• Add support for Django 3.0 (#950, #967)
• Officially support Python 3.8 (#967)
• Add better support for JS strict mode and validation (#952)
• Add support for rel=preload (#951)
• Add support for Calmjs (#957)

Note: in 2.3, a new setting COMPRESS_FILTERS has been introduced that combines the existing COMPRESS_CSS_FILTERS and COMPRESS_JS_FILTERS. The latter are now deprecated. See the docs <https://django-compressor.readthedocs.io/en/stable/settings/#django.conf.settings.COMPRESS_FILTERS>_ on how to use the new setting, the conversion is straightforward.

v2.3 (2019-05-31)

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)

Commits

• 6ac42ad Merge branch 'develop'
• c02b3df Merge pull request #964 from albertyw/release
• 9c988ab Tweak 2.4 release notes. Add note about COMPRESS_FILTERS that was added in 2.3.
• 27ab0b4 Merge pull request #978 from albertyw/update-django-appconf
• ef58524 Release v2.4
• 3445db7 Update django-appconf
• 33ca8eb Merge pull request #967 from albertyw/add-support
• 14c4f9a Remove django 2.1 deprecation
• 3db1c6e Use a fork of django-classy-tags to get django 3.0 support
• 4dfca68 Update django-sekizai package to 1.0.0
• Additional commits viewable in compare view

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[coveralls]

Pull Request Test Coverage Report for Build 5803

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.04%) to 65.795%

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Totals
Change from base Build 5800:	0.04%
Covered Lines:	10924
Relevant Lines:	16207

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💛 - Coveralls