update publish action to node 14

.github/workflows/publish-npm.yml

@@ -9,7 +9,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: 14
           registry-url: https://registry.npmjs.org/
       - run: npm ci
       - run: npm publish --access public