Upgrade Node.js version from 12.x to 14

Author: jonrohan

.github/workflows/nodejs.yml

@@ -10,10 +10,10 @@ jobs:
     runs-on: macos-latest
     steps:
     - uses: actions/checkout@v2
-    - name: Use Node.js 12.x
-      uses: actions/setup-node@v1
+    - name: Use Node.js 14
+      uses: actions/setup-node@v6
       with:
-        node-version: 12.x
+        node-version: 14
     - name: npm install, build, and test
       run: |
         npm install