Merge pull request #19 from alphahm/18-add-linting-to-github-action

add linting

.github/workflows/test.yml

@@ -21,6 +21,9 @@ jobs:
           python -m pip install --upgrade pip
           pip install -r requirements.txt
           pip install -e .
+      - name: lint
+        run: |
+          black --check src/
       - name: Test with pytest
         run: |
-          pytest
+          pytest