🔧 Add 'npm start' to run an example

Signed-off-by: kei-g <km.8k6ce+github@gmail.com>

Author: kei-g

package.json

@@ -51,6 +51,7 @@
     "lint": "eslint src/**/*.ts",
     "prebuild": "run-s clean",
     "prepublishOnly": "run-s build",
+    "start": "ts-node example.ts",
     "test": "run-p lint cover"
   },
   "types": "index.d.ts",