Laravel mix npm 运行 dev 解析失败 package.json

Laravel mix npm run dev failed to parse package.json

我正在关注这些系列 https://laracasts.com/series/whats-new-in-laravel-5-1/episodes/4, wich is about laravel 5.1 testin facilities, however i had to jump to this one https://laracasts.com/series/whats-new-in-laravel-5-4/episodes/3 因为 gulpfile.js 不再存在于 laravel,因为它现在使用 mix,但是当我尝试 运行 cmd npm 运行 dev 我收到以下错误:

尝试删除 devDependencies

"tdd": "...webpack.config.js" 之后的最后一个 ,