add workflow for jest

Author: robherley

.github/workflows/test.yml

@@ -0,0 +1,16 @@
+name: test
+
+on:
+  push:
+
+jobs:
+  jest:
+    name: jest
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 16
+    - run: npm ci
+    - run: npm test