add django3.2 to continuous integration tests

Author: bckohan

.github/workflows/test.yml

@@ -12,6 +12,7 @@ jobs:
           - 'Django~=2.2.0'
           - 'Django~=3.0.0'
           - 'Django~=3.1.0'
+          - 'Django~=3.2.0'
 
     steps:
     - uses: actions/checkout@v2