Add support of python 3.13 and django 5.1

https://docs.djangoproject.com/en/5.1/faq/install/#what-python-version-can-i-use-with-django

Author: joelcapitao

.github/workflows/test.yml

@@ -12,12 +12,16 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:  # https://docs.djangoproject.com/en/5.0/faq/install/#faq-python-version-support
-        django-version: [42, 50]
-        python-version: [3.9, 3.10, 3.11, 3.12]
+        django-version: [42, 50, 51]
+        python-version: [3.9, 3.10, 3.11, 3.12, 3.13]
 
         exclude:
           - django-version: 50
             python-version: 3.9
+          - django-version: 50
+            python-version: 3.13
+          - django-version: 51
+            python-version: 3.9
 
     steps:
       - uses: actions/checkout@v4

setup.py

@@ -27,9 +27,11 @@
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
+        'Programming Language :: Python :: 3.13',
         'Framework :: Django',
         'Framework :: Django :: 4.2',
         'Framework :: Django :: 5.0',
+        'Framework :: Django :: 5.1',
     ],
     python_requires='>=3.9',
     install_requires=[

tox.ini

@@ -1,9 +1,10 @@
 [tox]
-envlist = django{42,50}
+envlist = django{42,50,51}
 
 [testenv]
 commands =
     python runtests.py
 deps =
     django42: Django>=4.2,<5.0
     django50: Django>=5.0,<5.1
+    django51: Django>=5.1,<5.2