Fix CI workflow

.github/workflows/nodejs.yml

@@ -9,27 +9,20 @@ on:
     branches:
       - '**'
 
-env:
-  CI: true
-
 jobs:
   lint:
-    name: Lint on Node.js ${{ matrix.node }} and ${{ matrix.os }}
-
-    runs-on: ${{ matrix.os }}
+    name: Lint on Node.js LTS
 
-    strategy:
-      matrix:
-        node: [12]
-        os: [ubuntu-latest]
+    runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v2
 
-      - name: Use Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v1
+      - name: Use Node.js LTS
+        uses: actions/setup-node@v2
         with:
-          node-version: ${{ matrix.node }}
+          node-version: 'lts/*'
+          cache: npm
 
       - name: Install latest npm
         run: npm install --global npm@latest
@@ -48,15 +41,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node: [10, 12]
+        node: [12, 14, 16]
 
     steps:
       - uses: actions/checkout@v2
 
       - name: Use Node.js ${{ matrix.node }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node }}
+          cache: npm
 
       - name: Install latest npm
         run: npm install --global npm@latest