Update Python versions in tox configuration

tox.ini

@@ -1,16 +1,14 @@
 [tox]
 envlist =
-    py{py3,37,38}-django22
-    py37-django32
-    py{38,39,310}-django{32,40}
+    py{38,39,310,311}-django{32,41,42}
     docs
     flake8
 
 [testenv]
 deps =
-    django22: Django>=2.2,<2.3
     django32: Django>=3.2,<3.3
-    django40: Django>=4.0,<4.1
+    django41: Django>=4.1,<4.2
+    django42: Django>=4.2,<4.3
     coverage
     pytest
     pytest-cov
@@ -19,11 +17,10 @@ commands = pytest --cov=elevate --cov-report=xml {posargs}
 
 [gh-actions]
 python =
-    3.7: py37
     3.8: py38
     3.9: py39
     3.10: py310
-    pypy3: pypy3
+    3.11: py311
 
 [testenv:docs]
 changedir=docs