add python 3.12 tests

.github/workflows/tests-linux.yml

@@ -65,5 +65,31 @@ jobs:
           python3.7 -m pip install tox~=4.6.0
       - name: Run tests with tox
         run: tox -e py37
+  test-linux-py312:
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      # Install python 3.12
+      # List of available versions: https://github.com/actions/python-versions/blob/main/versions-manifest.json
+      - name: Install python 
+        uses: actions/setup-python@v4 
+        with:
+          python-version: '3.12' 
+      - name: Show OS version
+        run: cat /etc/os-release
+      - run: printenv
+      - name: Check D-Bus
+        run: ps -ef | grep dbus | grep -v grep
+      - name: Show python version
+        run: python --version
+      - name: Show platform information
+        run: python -c "import platform; print(platform.platform())"
+      - name: install tox
+        run: |
+          python3.12 -m pip install -U pip wheel && \
+          python3.12 -m pip install tox~=4.6.0
+      - name: Run tests with tox
+        run: tox -e py312