Update version classifiers

- Removed Django 5.0
- Removed Wagtail 5
- Added Django 5.2
- Added Wagtail 7
- Added Python 3.13

Author: ianmeigh

setup.cfg

@@ -20,11 +20,11 @@ classifiers =
     Topic :: Internet :: WWW/HTTP
     Framework :: Django
     Framework :: Django :: 4.2
-    Framework :: Django :: 5.0
     Framework :: Django :: 5.1
+    Framework :: Django :: 5.2
     Framework :: Wagtail
-    Framework :: Wagtail :: 5
     Framework :: Wagtail :: 6
+    Framework :: Wagtail :: 7
 keywords =
     wagtail
     s3