Install dependencies in action

.github/workflows/test_of_validate_package.yml

@@ -19,6 +19,9 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: '3.8'
+    
+    - name: Install dependencies
+        run: python -m pip install -r scripts/requirements.txt
 
     - name: Run Unittest
       run: |