Updates the django supported versions (#1289)

Author: kingbuzzman

README.rst

@@ -32,7 +32,7 @@ pytest-django allows you to test your Django project/applications with the
   <https://pytest-django.readthedocs.io/en/latest/contributing.html>`_
 * Version compatibility:
 
-  * Django: 4.2, 5.1, 5.2, 6.0 and latest main branch (compatible at the time
+  * Django: 5.2, 6.0 and latest main branch (compatible at the time
     of each release)
   * Python: CPython>=3.10 or PyPy 3
   * pytest: >=7.0

docs/contributing.rst

@@ -140,10 +140,10 @@ writing), running them all will take a long time. All valid configurations can
 be found in `tox.ini`. To test against a few of them, invoke tox with the `-e`
 flag::
 
-    $ tox -e py39-dj42-postgres,py310-dj52-mysql
+    $ tox -e py313-dj60-postgres,py314-dj62-mysql
 
-This will run the tests on Python 3.9/Django 4.2/PostgeSQL and Python
-3.10/Django 5.2/MySQL.
+This will run the tests on Python 3.13/Django 60/PostgeSQL and Python
+3.14/Django 6.2/MySQL.
 
 
 Measuring test coverage