add ci

.editorconfig

@@ -6,3 +6,7 @@ end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true
 insert_final_newline = true
+
+[.github/workflows/**.yml]
+indent_style = space
+indent_size = 2

.github/workflows/ci.yml

@@ -0,0 +1,21 @@
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  ci:
+    strategy:
+      matrix:
+        node-version: [18, 20]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npm run build
+      - run: npm run xo:check
+      - run: npm run test:ci