adds CI testing via GitHub Actions

.github/workflows/node.js.yml

@@ -0,0 +1,33 @@
+# This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
+
+name: Node.js CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  test:
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [18.x, 20.x, 22.x]
+        arch: [x64]
+
+    runs-on: ${{ matrix.os }}
+    name: ${{ matrix.os }} / Node ${{ matrix.node-version }} ${{ matrix.arch }}
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v2
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run specgen
+    - run: npm run build
+    - run: npm test