Bump celery from 5.0.2 to 5.2.2

Bumps [celery](https://github.com/celery/celery) from 5.0.2 to 5.2.2.
- [Release notes](https://github.com/celery/celery/releases)
- [Changelog](https://github.com/celery/celery/blob/master/Changelog.rst)
- [Commits](celery/celery@v5.0.2...v5.2.2)

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

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

setup.py

@@ -56,7 +56,7 @@
         'django-compressor==2.4',
         'python-dateutil==2.8.1',
         'django-celery-results==2.0.0',
-        'celery==5.0.2',
+        'celery==5.2.2',
         'MarkupSafe==1.1.1', # required for python 3.5
         'six==1.15.0',
         # the following is necessary due to https://github.com/python/importlib_metadata/issues/411