Update tox after Django 5.2 alpha release. (#1700)

tox.ini

@@ -3,7 +3,8 @@ envlist =
        {py39, py310, py311, py312}-django42,
        {py310, py311, py312}-django50,
        {py310, py311, py312, py313}-django51,
-       {py310, py311, py312, py313}-latest,
+       {py310, py311, py312, py313}-django52,
+       {py312, py313}-latest,
        isort,lint,docs,warnings,
 isolated_build = true
 
@@ -18,9 +19,10 @@ commands = coverage run --parallel-mode --source django_filters ./runtests.py --
 setenv =
        PYTHONDONTWRITEBYTECODE=1
 deps =
-    django42: Django>=4.2rc1,<5.0
-    django50: Django>=5.0b1,<5.1
-    django51: Django>=5.1a1,<5.2
+    django42: Django>=4.2,<5.0
+    django50: Django>=5.0,<5.1
+    django51: Django>=5.1,<5.2
+    django52: Django>=5.2a1,<6.0
     !latest: djangorestframework
     latest: {[latest]deps}
     -r requirements/test-ci.txt