tox.ini: Python 3.12

Author: cclauss

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion=2.9.0
-envlist = py310,lint,docs
+envlist = py312,lint,docs
 skipsdist = True
 
 [testenv]
@@ -15,7 +15,7 @@ passenv = CI,TRAVIS,TRAVIS_*,HOME
 deps =
   -r requirements/testing.txt
 basepython =
-    python3.10
+    python3.12
 # https://pytest-cov.readthedocs.io/en/latest/debuggers.html
 # https://github.com/microsoft/vscode-python/issues/693
 commands =