Test against Python 3.12

Author: spookylukey

.github/workflows/pythonpackage.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, "3.10", "3.11"]
+        python-version: [3.7, 3.8, 3.9, "3.10", "3.11", "3.12.0-alpha.7"]
         os: [ubuntu-latest]
         include:
           - python-version: 3.6

tox.ini

@@ -1,7 +1,7 @@
 # This config is for local testing. Where needed changes should be duplicated into
 # .github/workflows/pythonpackage.yml
 [tox]
-envlist = py36,py37,py38,py39,py310,py311,pypy3.6,flake8,isort
+envlist = py36,py37,py38,py39,py310,py311,py312,pypy3.6,flake8,isort
 
 [testenv]
 deps =