Add test CI workflow

Author: erbridge

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+on:
+  - push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        version: [16, 18, latest]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.version }}
+      - run: npm install
+      - run: npm test