fix workflow missing setuptools

Author: sunhailin

.github/workflows/python-app.yml

@@ -17,7 +17,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
+        python -m pip install --upgrade pip setuptools
         pip install -r requirements.txt
         pip install -r test/requirements.txt
     - name: Run unit test