Bump django-celery-results from 2.0.0 to 2.4.0

Bumps [django-celery-results](https://github.com/celery/django-celery-results) from 2.0.0 to 2.4.0.
- [Release notes](https://github.com/celery/django-celery-results/releases)
- [Changelog](https://github.com/celery/django-celery-results/blob/master/Changelog)
- [Commits](celery/django-celery-results@v2.0.0...v2.4.0)

---
updated-dependencies:
- dependency-name: django-celery-results
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -53,7 +53,7 @@
         'django-reversion==3.0.8',
         'django-compressor==2.4',
         'python-dateutil==2.8.1',
-        'django-celery-results==2.0.0',
+        'django-celery-results==2.4.0',
         'celery==5.0.2',
         'MarkupSafe==1.1.1', # required for python 3.5
         'six==1.15.0'