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

.github/workflows/test.yml

@@ -2,13 +2,12 @@ name: Test
 on:
   push:
     paths-ignore:
-      - '**.md'
+      - "**.md"
   pull_request:
     paths-ignore:
-      - '**.md'
+      - "**.md"
 
 jobs:
-
   build:
     name: Build
 
@@ -24,9 +23,10 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set Node.js 12.x
-      uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: 12.x
+          cache: npm
 
       - name: npm install
         run: npm install
@@ -52,27 +52,27 @@ jobs:
       - name: Upload artifact A
         uses: actions/upload-artifact@v1
         with:
-        name: 'Artifact-A'
+          name: "Artifact-A"
           path: path/to/artifact-A
 
       - name: Upload artifact B
         uses: actions/upload-artifact@v1
         with:
-        name: 'Artifact-B'
+          name: "Artifact-B"
           path: path/to/artifact-B
 
       # Test downloading a single artifact
       - name: Download artifact A
         uses: ./
         with:
-        name: 'Artifact-A'
+          name: "Artifact-A"
           path: some/new/path
 
       # Test downloading an artifact using tilde expansion
       - name: Download artifact A
         uses: ./
         with:
-        name: 'Artifact-A'
+          name: "Artifact-A"
           path: ~/some/path/with/a/tilde
 
       - name: Verify successful download
@@ -108,5 +108,3 @@ jobs:
               Write-Error "File contents of downloaded artifacts are incorrect"
           }
         shell: pwsh
-
-