Set node version NPM publish script to same version as CI tests (ajax…

…org#5617)

* fix: set node publish script to same version as test script

.github/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
     # Setup .npmrc file to publish to npm
     - uses: actions/setup-node@v1
       with:
-        node-version: '12.x'
+        node-version: '16.x'
         registry-url: 'https://registry.npmjs.org'
     - run: npm install
     - run: npm run test