Add coverage to the github action.

.github/workflows/test_ci.yml

@@ -27,8 +27,7 @@ jobs:
           python-version: '3.x'
       - name: Install dependencies
         run: |
-          python -m pip install --upgrade pip
-	  pip install coverage
+          python -m pip install --upgrade pip && pip install coverage
       - name: Test & publish code coverage
         uses: paambaati/codeclimate-action@v2.6.0
         env: