Update Python and Django versions in test (#87)

This removes EOL python and django versions from testing, and adds
Django 4.0 and Python 3.10, which are now available.

https://www.djangoproject.com/download/
https://endoflife.date/python

Author: stianjensen

.github/workflows/django.yml

@@ -13,19 +13,13 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9]
-        django-version: [2.2, 3.0, 3.1, 3.2]
+        python-version: ['3.8', '3.9', '3.10']
+        django-version: ['2.2', '3.2', '4.0']
         include:
-          - python-version: 3.6
-            django-version: 1.11
-          - python-version: 3.6
-            django-version: 2.0
-          - python-version: 3.6
-            django-version: 2.1
-          - python-version: 3.7
-            django-version: 2.0
-          - python-version: 3.7
-            django-version: 2.1
+          - python-version: '3.7'
+            django-version: '2.2'
+          - python-version: '3.7'
+            django-version: '3.2'
 
     steps:
       - uses: actions/checkout@v2

requirements/requirements.txt

@@ -1 +1 @@
-Django>=1.11
+Django>=2.2

setup.py

@@ -9,21 +9,17 @@
     "Environment :: Web Environment",
     "Framework :: Django",
     "Framework :: Django",
-    "Framework :: Django :: 1.11",
-    "Framework :: Django :: 2.0",
     "Framework :: Django :: 2.2",
-    "Framework :: Django :: 3.0",
-    "Framework :: Django :: 3.1",
     "Framework :: Django :: 3.2",
+    "Framework :: Django :: 4.0",
     "Intended Audience :: Developers",
     "License :: OSI Approved :: BSD License",
     "Operating System :: OS Independent",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.5",
-    "Programming Language :: Python :: 3.6",
     "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
     "Topic :: Software Development",
     "Topic :: Software Development :: Libraries :: Application Frameworks",
 ]