Fix make, tox, update requirements

requirements-dev.txt

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+-r requirements-test.txt
+-r docs/requirements.txt
+django==5.0

requirements-test.txt

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+tox==4.11.4
+coverage==7.3.4
+ruff==0.1.9

tox.ini

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+[tox]
+args_are_paths = false
+envlist =
+    py38-{3.2,4.1,4.2},
+    py39-{3.2,4.1,4.2},
+    py310-{3.2,4.1,4.2,5.0,main},
+    py311-{4.1,4.2,5.0,main},
+    py312-{4.2,5.0,main},
+    docs,
+    lint,
+
+[testenv]
+basepython =
+    py37: python3.7
+    py38: python3.8
+    py39: python3.9
+    py310: python3.10
+    py311: python3.11
+    py312: python3.12
+usedevelop = true
+pip_pre = true
+setenv =
+    PYTHONPATH={toxinidir}
+    PYTHONWARNINGS=all
+commands =
+    python manage.py test {posargs}
+deps =
+    3.2: Django==3.2.*
+    4.0: Django==4.0.*
+    4.1: Django==4.1.*
+    4.2: Django==4.2.*
+    5.0: Django==5.0.*
+    main: https://github.com/django/django/archive/main.tar.gz
+    -r{toxinidir}/requirements-test.txt
+
+[testenv:ruff]
+basepython = python3.11
+allowlist_externals = ruff
+deps = ruff
+commands = ruff .
+
+[testenv:docs]
+basepython = python3.11
+allowlist_externals = make
+setenv =
+    PYTHONWARNINGS=default
+commands =
+    make docs
+deps =
+    -r{toxinidir}/docs/requirements.txt