Improve github actions CI

.github/workflows/vscode-test.yaml

@@ -10,15 +10,22 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [macos-11, ubuntu-latest, windows-latest]
+        os:
+          - macos-11
+          - ubuntu-latest
+          - windows-latest
+        node_version:
+          - 16
     runs-on: ${{ matrix.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: Install Node.js
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v3
         with:
-          node-version: 10.x
+          node-version: ${{ matrix.node_version }}
+          cache: 'npm'
+          cache-dependency-path: '**/package-lock.json'
       - run: npm ci
       - run: xvfb-run -a npm test
         if: runner.os == 'Linux'