Update GitHub Actions scripts

Author: tkrotoff

.github/workflows/node.js.yml

@@ -1,4 +1,4 @@
-# https://github.com/actions/starter-workflows/blob/c934669ce246e6d64e54006b714b04199cbe445b/ci/node.js.yml
+# https://github.com/actions/starter-workflows/blob/a85155b04a1b885de7a5021312303fe5c1cb58e4/ci/node.js.yml
 
 name: Node.js CI
 
@@ -11,16 +11,15 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [12.x, 14.x, 16.x]
 
     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'
       - run: npm ci
       - run: npm run lint
       - run: npm run build
-        env:
-          CI: true

.github/workflows/npm-publish.yml

@@ -1,4 +1,4 @@
-# https://github.com/actions/starter-workflows/blob/c934669ce246e6d64e54006b714b04199cbe445b/ci/npm-publish.yml
+# https://github.com/actions/starter-workflows/blob/a85155b04a1b885de7a5021312303fe5c1cb58e4/ci/npm-publish.yml
 
 name: Node.js Package
 
@@ -11,9 +11,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
-          node-version: 12
+          node-version: 14
       - run: npm ci
       - run: npm run lint
       - run: npm run build
@@ -23,9 +23,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/setup-node@v2
         with:
-          node-version: 12
+          node-version: 14
           registry-url: https://registry.npmjs.org/
       - run: npm ci
       - run: npm publish --access public