帮忙看看，这个是啥错误呢，react新手,准备学校antd，用的dva,项目启动报错如下
F:\ReactPro\jjhealth\node_modules\.0.2.3@roadhog\bin\roadhog.js:7
let result;
^^^
SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:139:18)
at node.js:990:3
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "D:\\Program Files\\nodejs\\node.exe" "D:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "start"
npm ERR! node v4.7.0
npm ERR! npm v2.15.11
npm ERR! code ELIFECYCLE
npm ERR! @ start: `roadhog server`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the @ start script 'roadhog server'.
npm ERR! This is most likely a problem with the package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! roadhog server
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR! npm owner ls
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! F:\ReactPro\jjhealth\npm-debug.log