Update code coverage configuration

Author: phatnguyenuit

.github/workflows/ci.yml

@@ -35,8 +35,11 @@ jobs:
     - name: Install dependencies
       run: yarn
 
-    - name: Run the tests and generate coverage report
+    - name: Run test coverage
       run: yarn test --coverage
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v1
       with:
         token: ${{ secrets.CODECOV_TOKEN }}