Add Python 3.10 test pipeline for Django 3.2 (#1521)

Author: hramezani

tox.ini

@@ -5,7 +5,7 @@ envlist =
     packaging
     py{36,37}-dj{22,31,32}-{sqlite,postgresql,postgis,mysql}
     py{38,39}-dj{22,31,32,40,main}-{sqlite,postgresql,postgis,mysql}
-    py{310}-dj{40,main}-{sqlite,postgresql,postgis,mysql}
+    py{310}-dj{32,40,main}-{sqlite,postgresql,postgis,mysql}
 
 [testenv]
 deps =