Test on Python 3.12 prereleases

.github/workflows/main.yml

@@ -12,17 +12,15 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        include:
-        - python: "3.8"
-          docutils: du18
-        - python: "3.9"
-          docutils: du19
-        - python: "3.10"
-          docutils: du19
-        - python: "3.10"
-          docutils: du19
-        - python: "3.11-dev"
-          docutils: py311
+        python:
+        - "3.8"
+        - "3.9"
+        - "3.10"
+        - "3.11"
+        - "3.12-dev"
+        docutils:
+        - "du18"
+        - "du19"
 
     steps:
     - uses: actions/checkout@v3

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.4.0
-envlist = docs,flake8,mypy,twine,py{38,39,310,311},du{18,19}
+envlist = docs,flake8,mypy,twine,py{38,39,310,311,312},du{18,19}
 isolated_build = True
 
 [testenv]
@@ -17,7 +17,7 @@ passenv =
     EPUBCHECK_PATH
     TERM
 description =
-    py{38,39,310,311}: Run unit tests against {envname}.
+    py{38,39,310,311,312}: Run unit tests against {envname}.
     du{18,19}: Run unit tests with the given version of docutils.
 deps =
     du18: docutils==0.18.*