Merge pull request #175 from Seluj78/dependabot/pip/backend/celery-4.4.5

Bump celery from 4.4.4 to 4.4.5 in /backend

Author: Seluj78

backend/requirements.txt

@@ -12,7 +12,7 @@ pymysql==0.9.3
 
 Flask-Mail==0.9.1
 
-celery==4.4.4
+celery==4.4.5
 redis==3.5.3
 
 itsdangerous==1.1.0