Run tests on Django 5.1 in CI (#438)

Author: Ch00k

pyproject.toml

@@ -25,7 +25,7 @@ min_version = 4.4
 envlist =
     {py37,py38,py39,py310,py311}-django{320}-{end2end,unittests}
     {py38,py39,py310,py311,py312}-django{400,410,420}-{end2end,unittests}
-    {py310,py311,py312}-django{500}-{end2end,unittests}
+    {py310,py311,py312}-django{500,510}-{end2end,unittests}
     py39-lint
 
 [gh-actions]
@@ -44,6 +44,7 @@ deps =
     django410: Django>=4.1,<4.2
     django420: Django>=4.2,<4.3
     django500: Django>=5.0a1,<5.1
+    django510: Django>=5.1
     coverage
     -rrequirements.txt
 skip_missing_interpreters=true