Update pythonpackage.yml

.github/workflows/pythonpackage.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest
+        pip install pytest wheel
         pip install -r requirements.txt
 #    - name: Lint with flake8
 #      run: |