type module

package.json

@@ -4,6 +4,7 @@
   "description": "Simple process spawning utility for node.js",
   "main": "./lib/index.js",
   "types": "./@types/index.d.ts",
+  "type": "module",
   "scripts": {
     "build": "tsc",
     "watch": "npm run build -- --watch"