Bump django-compressor from 2.2 to 2.4 in /cvat/requirements (#1720)

Bumps [django-compressor](https://github.com/django-compressor/django-compressor) from 2.2 to 2.4.
- [Release notes](https://github.com/django-compressor/django-compressor/releases)
- [Changelog](https://github.com/django-compressor/django-compressor/blob/develop/docs/changelog.txt)
- [Commits](https://github.com/django-compressor/django-compressor/compare/2.2...2.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

cvat/requirements/base.txt

@@ -3,7 +3,7 @@ Django==2.2.13
 django-appconf==1.0.4
 django-auth-ldap==1.4.0
 django-cacheops==5.0
-django-compressor==2.2
+django-compressor==2.4
 django-rq==2.0.0
 EasyProcess==0.2.3
 Pillow==7.1.2