Adding Python3.12 to Action

Author: howroyd

.github/workflows/ci.yml

@@ -17,6 +17,13 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         # python-version: ["2.7", "3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
         python-version: ["3.8", "3.9", "3.10", "3.11"]
+        include:
+          - os: ubuntu-latest
+            python-version: "3.12"
+          - os: windows-latest
+            python-version: "3.12"
+          - os: macos-latest
+            python-version: "3.12"
 
 # What works:
 #  macos 3.8-3.11