Add CI support for Django 3.2

* Update Tox to run with Django 3.2.
* Silence pytest warning regarding junit_family setting.
* Only configure `default_app_config` in Django 3.1 and older. [0]
* Fix fake Django app name, which starts failing in Django 3.2 when the
  name is not a valid Python identifier.

[0] https://docs.djangoproject.com/en/3.2/releases/3.2/#automatic-appconfig-discovery

Author: Photonios

pytest.ini

@@ -2,5 +2,6 @@
 DJANGO_SETTINGS_MODULE=settings
 testpaths=tests
 addopts=-m "not benchmark"
+junit_family=legacy
 filterwarnings =
     ignore::UserWarning

setup.py

@@ -55,6 +55,9 @@ def run(self):
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Internet :: WWW/HTTP",
         "Topic :: Internet :: WWW/HTTP :: Dynamic Content",
     ],

tox.ini

@@ -3,12 +3,12 @@ envlist = py36-dj{20,21,22,30,31,32}, py37-dj{20,21,22,30,31,32}, py38-dj{20,21,
 
 [testenv]
 deps =
-    dj20: Django>=2.0,<2.1
-    dj21: Django>=2.1,<2.2
-    dj22: Django>=2.2,<2.3
-    dj30: Django>=3.0,<3.0.2
-    dj31: Django>=3.1,<3.2
-    dj32: Django>=3.2,<3.3
+    dj20: Django~=2.0.0
+    dj21: Django~=2.1.0
+    dj22: Django~=2.2.0
+    dj30: Django~=3.0.0
+    dj31: Django~=3.1.0
+    dj32: Django~=3.2.0
     .[test]
 setenv =
     DJANGO_SETTINGS_MODULE=settings