Update CI to use Python 3.11 and latest actions

The workflow now sets up Python 3.11 instead of 3.8 and updates the actions/checkout and actions/setup-python versions to v2 and v4, respectively, ensuring compatibility with newer Python features and improved GitHub Actions support.

Author: douden

.github/workflows/tests.yml

@@ -12,10 +12,10 @@ jobs:
     steps:
       - name: Checkout source
         uses: actions/checkout@v2
-      - name: Set up Python 3.8
-        uses: actions/setup-python@v1
+      - name: Set up Python 3.11
+        uses: actions/setup-python@v4
         with:
-          python-version: "3.8"
+          python-version: "3.11"
       - name: Build package
         run: |
           pip install build