build(deps): bump celery from 4.4.2 to 4.4.4 (#50)

Bumps [celery](https://github.com/celery/celery) from 4.4.2 to 4.4.4.
- [Release notes](https://github.com/celery/celery/releases)
- [Changelog](https://github.com/celery/celery/blob/master/Changelog.rst)
- [Commits](https://github.com/celery/celery/compare/4.4.2...v4.4.4)

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

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

Pipfile.lock

@@ -68,11 +68,11 @@
         },
         "celery": {
             "hashes": [
-                "sha256:108a0bf9018a871620936c33a3ee9f6336a89f8ef0a0f567a9001f4aa361415f",
-                "sha256:5b4b37e276033fe47575107a2775469f0b721646a08c96ec2c61531e4fe45f2a"
+                "sha256:9ae2e73b93cc7d6b48b56aaf49a68c91752d0ffd7dfdcc47f842ca79a6f13eae",
+                "sha256:c2037b6a8463da43b19969a0fc13f9023ceca6352b4dd51be01c66fbbb13647e"
             ],
             "index": "pypi",
-            "version": "==4.4.2"
+            "version": "==4.4.4"
         },
         "certifi": {
             "hashes": [