Update npm-publish.yml

Author: oliver021

.github/workflows/npm-publish.yml

@@ -21,7 +21,18 @@ jobs:
       - run: npm install
       - run: npm test
 
-  
+  publish-npm:
+      needs: build
+      runs-on: ubuntu-latest
+      steps:
+        - uses: actions/checkout@v2
+        - uses: actions/setup-node@v1
+          with:
+            node-version: 12
+            registry-url: https://registry.npmjs.org/
+        - run: npm publish
+          env:
+            NODE_AUTH_TOKEN: ${{secrets.NPM_API_KEY}}
 
   publish-gpr:
     needs: build