Add GitHub actions to do some basic testing

.github/workflows/build.yml

@@ -0,0 +1,22 @@
+name: Build and test
+on: [push, pull_request]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [16.x, 18.x]
+        directory: [common, frcal, jcal]
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install dependencies
+        run: npm ci --include=dev
+      - name: Build
+        run: |
+          cd ${{ matrix.directory }}
+          [ "${{ matrix.directory }}" != common ] && CI=false npm run build
+          npm test -- --watchAll=false --ci --passWithNoTests