Add official support for Django 5.1

Following the supported Python versions:

https://docs.djangoproject.com/en/stable/faq/install/

README.md

@@ -55,7 +55,7 @@ Some reasons you might want to use REST framework:
 # Requirements
 
 * Python 3.8+
-* Django 5.0, 4.2
+* Django 4.2, 5.0, 5.1
 
 We **highly recommend** and only officially support the latest patch release of
 each Python and Django series.

docs/index.md

@@ -87,7 +87,7 @@ continued development by **[signing up for a paid plan][funding]**.
 
 REST framework requires the following:
 
-* Django (4.2, 5.0)
+* Django (4.2, 5.0, 5.1)
 * Python (3.8, 3.9, 3.10, 3.11, 3.12)
 
 We **highly recommend** and only officially support the latest patch release of

setup.py

@@ -91,6 +91,7 @@ setup(
         'Framework :: Django',
         'Framework :: Django :: 4.2',
         'Framework :: Django :: 5.0',
+        'Framework :: Django :: 5.1',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',

tox.ini

@@ -1,9 +1,9 @@
 [tox]
 envlist =
        {py38,py39}-{django42}
-       {py310}-{django42,django50,djangomain}
-       {py311}-{django42,django50,djangomain}
-       {py312}-{django42,django50,djangomain}
+       {py310}-{django42,django50,django51,djangomain}
+       {py311}-{django42,django50,django51,djangomain}
+       {py312}-{django42,django50,django51,djangomain}
        base
        dist
        docs
@@ -17,6 +17,7 @@ setenv =
 deps =
         django42: Django>=4.2,<5.0
         django50: Django>=5.0,<5.1
+        django51: Django>=5.1,<5.2
         djangomain: https://github.com/django/django/archive/main.tar.gz
         -rrequirements/requirements-testing.txt
         -rrequirements/requirements-optionals.txt
@@ -42,12 +43,6 @@ deps =
        -rrequirements/requirements-testing.txt
        -rrequirements/requirements-documentation.txt
 
-[testenv:py38-djangomain]
-ignore_outcome = true
-
-[testenv:py39-djangomain]
-ignore_outcome = true
-
 [testenv:py310-djangomain]
 ignore_outcome = true