requirements: Bump Django to 5.1.x, django-filter to 24.3.0

Signed-off-by: Stephen Finucane <[email protected]>

tox.ini

@@ -1,17 +1,20 @@
 [tox]
 minversion = 3.2
-envlist = pep8,docs,py{39,310,311}-django42,py{310,311,312}-django50
+envlist = pep8,docs,py{39,310,311}-django42,py{310,311,312}-django{50,51}
 
 [testenv]
 skip_install = true
 deps =
     -r{toxinidir}/requirements-test.txt
     django42: django~=4.2.0
     django42: djangorestframework~=3.15.0
-    django42: django-filter~=24.2.0
+    django42: django-filter~=24.3.0
     django50: django~=5.0.0
     django50: djangorestframework~=3.15.0
-    django50: django-filter~=24.2.0
+    django50: django-filter~=24.3.0
+    django51: django~=5.1.0
+    django51: djangorestframework~=3.15.0
+    django51: django-filter~=24.3.0
 setenv =
     DJANGO_SETTINGS_MODULE = patchwork.settings.dev
     PYTHONDONTWRITEBYTECODE = 1