Upgrade to celery 5.2.2

Author: esirK

.env.sample

@@ -30,8 +30,6 @@ DEBUNKBOT_CELERY_ACCEPT_CONTENT=
 DEBUNKBOT_CELERY_TASK_SERIALIZER=
 DEBUNKBOT_CELERY_RESULT_SERIALIZER=
 DEBUNKBOT_CELERY_TIMEZONE=
-DEBUNKBOT_CELERY_SLACK_WEBHOOK=
-DEBUNKBOT_CELERY_SLACK_WEBHOOK_FAILURES_ONLY=
 DEBUNKBOT_OAUTH_EMAILS=.*@example\.com
 
 # Flower

requirements-all.txt

@@ -1,15 +1,14 @@
 asgiref==3.3.2
 cachetools==4.2.1
-celery==4.4.2
-celery-slack==0.4.1
+celery==5.2.2
 certifi==2020.12.5
 chardet==4.0.0
 dj-database-url==0.5.0
 Django==3.2
 django-redis==4.12.1
 djangorestframework==3.12.4
 factory-boy==3.2.0
-flower==0.9.7
+flower==1.0.0
 gevent==21.12.0
 google-auth==1.28.0
 google-auth-oauthlib==0.4.4