Run tests in Python 3.8 and 3.9

.github/workflows/unittests.yml

@@ -9,13 +9,22 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    
+    name: Test Python ${{ matrix.python.version }}
+    strategy:
+      fail-fast: false
+      matrix:
+        python:
+          - {version: '3.8'}
+          - {version: '3.9'}
+          #- {version: '3.10'}
 
     steps:
     - uses: actions/checkout@v2
-    - name: Set up Python 3.9
+    - name: Set up Python ${{ matrix.python.version }}
       uses: actions/setup-python@v1
       with:
-        python-version: 3.9
+        python-version: ${{ matrix.python.version }}
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip