Updated workflow syntax

Author: cferdinandi

.github/main.workflow

@@ -0,0 +1,13 @@
+on: push
+name: publish on release
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: publish
+      uses: actions/npm@master
+      env:
+        NPM_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }}
+      with:
+        args: publish