Merge pull request #91 from Cryptophobia/master

chore(django): upgrade django version to latest patch

Author: Cryptophobia

rootfs/requirements.txt

@@ -1,6 +1,6 @@
 # Deis controller requirements
 backoff==1.4.3
-django==1.11.18
+django==1.11.20
 django-auth-ldap==1.2.15
 django-cors-middleware==1.3.1
 django-guardian==1.4.9