Bump django from 2.2 to 2.2.2 (#46)

Author: dependabot[bot]

Pipfile

@@ -16,7 +16,7 @@ dj-database-url = "==0.5.0"
 django-configurations = "==2.1"
 django-debug-toolbar = "==1.11"
 django-extensions = "==2.1.6"
-Django = "==2.2"
+Django = "==2.2.2"
 gunicorn = "==19.9.0"
 whitenoise = "==4.1.2"
 "psycopg2-binary" = "==2.8.2"