Dajango 5.1.1 support (#26)

* fix versions

* fix warnings

README.md

@@ -2,8 +2,8 @@
 
 [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vb64/django.admin.filters/pep257.yml?label=Pep257&style=plastic&branch=main)](https://github.com/vb64/django.admin.filters/actions?query=workflow%3Apep257)
 [![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vb64/django.admin.filters/django3.yml?label=Django%203.2.25&style=plastic&branch=main)](https://github.com/vb64/django.admin.filters/actions?query=workflow%3Adjango3)
-[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vb64/django.admin.filters/django4.yml?label=Django%204.2.13&style=plastic&branch=main)](https://github.com/vb64/django.admin.filters/actions?query=workflow%3Adjango4)
-[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vb64/django.admin.filters/django5.yml?label=Django%205.0.6&style=plastic&branch=main)](https://github.com/vb64/django.admin.filters/actions?query=workflow%3Adjango5)
+[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vb64/django.admin.filters/django4.yml?label=Django%204.2.16&style=plastic&branch=main)](https://github.com/vb64/django.admin.filters/actions?query=workflow%3Adjango4)
+[![GitHub Workflow Status](https://img.shields.io/github/actions/workflow/status/vb64/django.admin.filters/django5.yml?label=Django%205.1.1&style=plastic&branch=main)](https://github.com/vb64/django.admin.filters/actions?query=workflow%3Adjango5)
 [![Codacy Badge](https://app.codacy.com/project/badge/Grade/926ec3c1141f4230b4d0508497e5561f)](https://app.codacy.com/gh/vb64/django.admin.filters/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)
 [![Codacy Badge](https://app.codacy.com/project/badge/Coverage/926ec3c1141f4230b4d0508497e5561f)](https://app.codacy.com/gh/vb64/django.admin.filters/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_coverage)
 [![PyPI - Downloads](https://img.shields.io/pypi/dm/django-admin-list-filters?label=pypi%20installs)](https://pypistats.org/packages/django-admin-list-filters)

pytest5.ini

@@ -1,3 +1,3 @@
 [pytest]
 filterwarnings =
-    ignore::django.utils.deprecation.RemovedInDjango51Warning
+    ignore::django.utils.deprecation.RemovedInDjango60Warning

tests/django4.txt

@@ -1 +1 @@
-Django==4.2.13
+Django==4.2.16

tests/django5.txt

@@ -1 +1 @@
-Django==5.0.6
+Django==5.1.1