ci(workflow): add 'npm' cache for actions/setup-node in .github/workflows

.github/workflows/workflow.yml

@@ -6,13 +6,13 @@ on:
       - main
       - releases/**
     paths-ignore:
-      - '**.md'
+      - "**.md"
   push:
     branches:
       - main
       - releases/**
     paths-ignore:
-      - '**.md'
+      - "**.md"
 
 jobs:
   # Build and unit test
@@ -26,9 +26,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v2
       - name: Setup Node.js
-      uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
-        node-version: '12.x'
+          node-version: "12.x"
+          cache: npm
       - name: Determine npm cache directory
         id: npm-cache
         run: |
@@ -58,7 +59,6 @@ jobs:
             exit 1
           fi
 
-
   # End to end save and restore
   test-save:
     strategy: