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/admin.py

@@ -3,7 +3,7 @@ from django.contrib import admin
 from django.utils.translation import gettext_lazy as _
 
 from django_q.conf import Conf, croniter
-from django_q.models import Success, Failure, Schedule, OrmQ
+from django_q.models import Failure, OrmQ, Schedule, Success
 from django_q.tasks import async_task
 
 
@@ -60,7 +60,7 @@ class FailAdmin(admin.ModelAdmin):
 
 
 class ScheduleAdmin(admin.ModelAdmin):
-    """ model admin for schedules """
+    """model admin for schedules"""
 
     list_display = (
         "id",
@@ -84,7 +84,7 @@ class ScheduleAdmin(admin.ModelAdmin):
 
 
 class QueueAdmin(admin.ModelAdmin):
-    """  queue admin for ORM broker """
+    """queue admin for ORM broker"""
 
     list_display = ("id", "key", "task_id", "name", "func", "lock")
 
@@ -100,7 +100,7 @@ class QueueAdmin(admin.ModelAdmin):
     def has_add_permission(self, request):
         """Don't allow adds."""
         return False
-    
+
     list_filter = ("key",)