Format checker in gihtub pipeline

.github/workflows/format.yml

@@ -0,0 +1,21 @@
+name: Format Check
+
+on: [push]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x]
+        # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'npm'
+      - run: npm run check-format

package.json

@@ -18,6 +18,7 @@
 		"dev": "tsc --watch",
 		"lint": "eslint --ext .js,.ts . --fix",
 		"format": "prettier --write .",
+		"check-format": "prettier --check .",
 		"typedoc": "typedoc src/index.ts"
 	},
 	"keywords": [