changing release step to trigger on pr close and merge (#16)

changing release step to trigger to allow new semantic release version
to be merged into code

.github/workflows/publish.yml

@@ -1,15 +1,15 @@
 # This workflow will run tests using node and then publish a package to GitHub Packages when a release is created
 # For more information see: https://docs.github.com/en/actions/publishing-packages/publishing-nodejs-packages
 
-name: NPM Publish
+name: Release
 
 on:
-  push:
-    branches:
-      - main
+  pull_request:
+    types: [closed]
 
 jobs:
   release:
+    if: github.event.pull_request.merged == true
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code