Test with Django 5.2.1, 5.1.9 and 4.2.21 (#1063)

* Update Django version in test project

* Test with Django 5.2.1, 5.1.9 and 4.2.21

Author: mbraak

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        django: ["django==4.2.20", "django==5.1.8", "django==5.2"]
+        django: ["django==4.2.21", "django==5.1.9", "django==5.2.1"]
 
     services:
       postgres:

testproject/requirements_django.txt

@@ -1 +1 @@
-Django>=5.1,<5.2
+Django>=5.2,<5.3