add py 3.8 for tests

.github/workflows/run_pytest.yml

@@ -9,22 +9,27 @@ jobs:
       max-parallel: 3
       matrix:
         os: [ubuntu-latest]
-        python-version: [3.5, 3.6, 3.7]
+        python-version: [3.5, 3.6, 3.7, 3.8]
     runs-on: ${{matrix.os}}
+
     steps:
     - uses: actions/checkout@v1
+
     - name: Set up Python ${{matrix.python-version}} at ${{matrix.os}}
       uses: actions/setup-python@v1
       with:
         python-version: ${{matrix.python-version}}
+
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
         mkdir log/
+
     - name: Test with pytest
       run: |
         pytest -c 'test/pytest.ini'
+        
     - name: Save artifacts
       uses: actions/upload-artifact@master
       with: