ci: update actions/setup-node to v2, enable cache (#1008)

* ci: update actions/setup-node to v2

* ci: enable npm package cache

* Fix YAML syntax error

Author: HonkingGoose

.github/workflows/node.js.yml

@@ -18,9 +18,10 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
+        cache: 'npm'
     - name: npm 7
       run: npm i -g npm@7
     - run: npm ci --ignore-scripts