Add all supported Django versions to the test matrix

Author: ulgens

.github/workflows/test.yml

@@ -52,7 +52,7 @@ jobs:
       max-parallel: 6
       matrix:
         python-version: ["3.11", "3.12", "3.13",  "3.14",  "3.14t"]
-        django-version: ["5.2"]
+        django-version: ["5.0", "5.1", "5.2"]
         broker: ["redis", "fakeredis", "valkey"]
         include:
           - python-version: "3.14t"