Use matrix build to test with all supported python versions

.github/workflows/test.yml

@@ -11,15 +11,18 @@ permissions:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        py-version: ["3.8", "3.9", "3.10", "3.11"]
 
     runs-on: ubuntu-20.04
 
     steps:
       - uses: actions/checkout@v3
-      - name: Set up Python 3.8
+      - name: Set up Python ${{ matrix.py-version }}
         uses: actions/setup-python@v3
         with:
-          python-version: "3.8"
+          python-version: ${{ matrix.py-version }}
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip