Update nodejs.yml

Run checks on pull requests

Author: adamgruber

.github/workflows/nodejs.yml

@@ -1,6 +1,13 @@
 name: Node CI
 
-on: [push]
+on: 
+  push:
+    branches: 
+      - master
+      - main
+  pull_request:
+      types: [opened,edited,reopened,synchronize]
+    
 
 jobs:
   build: