Update CI workflow to run on pull requets

.github/workflows/nodejs.yml → .github/workflows/ci.yml

@@ -1,6 +1,10 @@
 name: Node CI
 
-on: [push]
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
 
 jobs:
   build:
@@ -11,9 +15,9 @@ jobs:
         node-version: [12.x, 14.x, lts/*]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
       - name: npm install, build, and test