matrix of python versions

Author: Victor Machado

Diff for: .github/workflows/test-credentials.yml

@@ -7,16 +7,23 @@ on: [push, pull_request]
 jobs:
   test-credentials:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
     steps:
 
       - uses: actions/checkout@v4
         with:
           ref: ${{ github.ref }}
 
-      - name: Set up Python
+      - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
+          python-version: ${{ matrix.python-version }}
+
+      - name: Display Python version
+        run: python3 -c "import sys; print(sys.version)"
 
       - name: Create and activate virtual environment
         run: |