Update pythonpackage.yml

.github/workflows/pythonpackage.yml

@@ -13,20 +13,26 @@ jobs:
         python-version: ['3.5', '3.6', '3.7', '3.8', '3.9', '3.10']
 
     steps:
+    
     - uses: actions/checkout@v1
+    
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v1
       with:
         python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+        
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
         pip install -r requirements-test.txt
+    
     - name: Test with unittest
       run: |
         coverage run -m unittest
         coverage xml -o ./coverage.xml
+    
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v2
       with: