Update Node.js versions in build workflow

.github/workflows/build.yml

@@ -1,26 +1,28 @@
 name: build
 
-on: [push]
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
 
 jobs:
   build:
+    runs-on: ubuntu-latest
 
-    runs-on: macOS-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
 
-    strategy:
-      matrix:
-        node-version: [8.x, 10.x, 12.x]
+      - name: Setup Node.js environment
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
 
-    steps:
-    - uses: actions/checkout@v1
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
-      with:
-        node-version: ${{ matrix.node-version }}
-    - name: npm install, build, and test
-      run: |
-        npm install
-        npm run build --if-present
-        npm test
-      env:
-        CI: true
+      - name: Run Continuous Integration
+        run: |
+          npm install
+          npm run build --if-present
+          npm test
+        env:
+          CI: true