split off black check

Author: terriko

.github/workflows/pythonapp.yml

@@ -28,3 +28,22 @@ jobs:
     - name: Run tests
       run: |
         ACTIONS=1 python setup.py test
+
+  check:
+    name: Black check
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up Python
+      uses: actions/setup-python@v1
+      with:
+        python-version: ${{ matrix.python }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+    - name: Lint with black
+      run: |
+        pip install black
+        black --check cve_bin_tool/
+        black --check test/