Add Python3.11 and Python3.12 tests

Author: ubaumann

.github/workflows/main.yaml

@@ -48,7 +48,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.8', '3.9', '3.10' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12' ]
         platform: [ubuntu-latest, macOS-latest, windows-latest]
     runs-on: ${{ matrix.platform }}
     steps:
@@ -88,7 +88,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.8', '3.9', '3.10' ]
+        python-version: [ '3.8', '3.9', '3.10', '3.11', '3.12' ]
         platform: [ubuntu-latest, macOS-latest, windows-latest]
         extra: [ 'jinja', 'ttp', 'jsonpatch']
     runs-on: ${{ matrix.platform }}