Add build CI

Fixes #784

Author: andersevenrud

.github/workflows/node.yml

@@ -0,0 +1,21 @@
+name: Node tests
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+jobs:
+  build:
+    strategy:
+      matrix:
+        version: [12, 13, 14, 15, 16]
+        os: [ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.version }}
+      - run: npm ci
+      - run: npm run package:discover
+      - run: npm run build