Build improvements (#569)

* Black linting

* Adding Black to dev dependencies and upping minimal python to 3.6.2 for compatibility

* Updating packages

* Removing pip-tools input and exporting requirements with poetry

* Deleting old setup files and test runner

* Trying 1.3.7

* Looser extras requirements to prevent conflicts

* Sorted imports with isort

* Added iSort to dev dependencies

* Fixes localtime for naive setups

django_q/brokers/disque.py

@@ -2,10 +2,11 @@ import random
 
 # External
 import redis
-from redis import Redis
 
 # Django
 from django.utils.translation import gettext_lazy as _
+from redis import Redis
+
 from django_q.brokers import Broker
 from django_q.conf import Conf