Add GitHub Actions workflow

Author: jakezatecky

.github/workflows/main.yml

@@ -0,0 +1,25 @@
+name: Build
+on:
+  push:
+  pull_request:
+jobs:
+  build-and-test:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node: [18, 20]
+    steps:
+      -
+        uses: actions/checkout@v3
+      -
+        name: Use Node.js ${{ matrix.node }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node }}
+      -
+        name: Install dependencies
+        run: yarn install
+      -
+        name: Run tests
+        run: npm run test