Add Django 3.2 to the tox test matrix

Author: Tenzer

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{36,37,38,39}-django{22,30,31}-drf{312,master},
+    py{36,37,38,39}-django{22,30,31,32}-drf{312,master},
     lint,docs
 
 [gh-actions]
@@ -15,6 +15,7 @@ DJANGO =
     2.2: django22
     3.0: django30
     3.1: django31
+    3.2: django32
 
 DJANGO_REST_FRAMEWORK =
     3.12: drf312
@@ -25,6 +26,7 @@ deps =
     django22: Django>=2.2,<2.3
     django30: Django>=3.0,<3.1
     django31: Django>=3.1,<3.2
+    django32: Django>=3.2,<3.3
     drf312: djangorestframework>=3.12,<3.13
     drfmaster: https://github.com/encode/django-rest-framework/archive/master.zip
     -rrequirements/requirements-testing.txt