Add python version matrix to integration test ci

Author: petern48

.github/workflows/python-ci.yml

@@ -69,6 +69,9 @@ jobs:
 
   integration-test:
     runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        python: ['3.9', '3.10', '3.11', '3.12']
 
     steps:
     - uses: actions/checkout@v4