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/__init__.py

@@ -1,7 +1,7 @@
 import importlib
 from typing import Optional
 
-from django.core.cache import caches, InvalidCacheBackendError
+from django.core.cache import InvalidCacheBackendError, caches
 
 from django_q.conf import Conf
 

django_q/brokers/aws_sqs.py

@@ -38,7 +38,9 @@ class Sqs(Broker):
             if not isinstance(wait_time_second, int):
                 raise ValueError("receive_message_wait_time_seconds should be int")
             if wait_time_second > 20:
-                raise ValueError("receive_message_wait_time_seconds is invalid. Reason: Must be >= 0 and <= 20")
+                raise ValueError(
+                    "receive_message_wait_time_seconds is invalid. Reason: Must be >= 0 and <= 20"
+                )
             params.update({"WaitTimeSeconds": wait_time_second})
 
         tasks = self.queue.receive_messages(**params)
@@ -80,7 +82,7 @@ class Sqs(Broker):
             config["region_name"] = config["aws_region"]
             del config["aws_region"]
 
-        if 'receive_message_wait_time_seconds' in config:
+        if "receive_message_wait_time_seconds" in config:
             del config["receive_message_wait_time_seconds"]
 
         return Session(**config)

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