Test supported Python versions

Author: davesteele

.github/workflows/testnox.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.13.0-alpha - 3.13.0"]
+        python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
     - name: Check out
       uses: actions/checkout@v4