Merge pull request #146 from Cryptophobia/master

chore(django): upgrade django to >= 2.2.20

Author: Cryptophobia

rootfs/requirements.txt

@@ -1,6 +1,6 @@
 # Deis controller requirements
 backoff==1.8.0
-django==2.2.19,<3.0
+django>=2.2.20,<3.0
 django-auth-ldap==2.3.0,<3.0
 django-cors-middleware==1.5.0
 django-guardian==2.3.0