运行报错了 about gracejs

[xiongwilee]

node 版本是 v7.6.0+ 吗？

[kangning1206]

我的node版本v6.10.3；

knbdeMacBook-Pro:koa-grace knb$ npm run dev

> gracejs@2.0.10 dev /Users/knb/workspace/github/koa-grace
> nodemon bin/server.js

[nodemon] 1.11.0
[nodemon] reading config /Users/knb/workspace/github/koa-grace/nodemon.json
[nodemon] to restart at any time, enter `rs`
[nodemon] ignoring: /Users/knb/workspace/github/koa-grace/.git/**/* .nyc_output .sass-cache bower_components coverage /Users/knb/workspace/github/koa-grace/node_modules/**/* /Users/knb/workspace/github/koa-grace/.git/**/* node_modules/**/node_modules
[nodemon] watching: app/*/controller/**/* app/*/model/**/* app/*/mock/**/*
[nodemon] watching extensions: js,json
[nodemon] starting `node bin/server.js`
[nodemon] child pid: 6148
[nodemon] watching 342 files
/Users/knb/workspace/github/koa-grace/middleware/body/index.js:51
  return async function body(ctx, next) {
               ^^^^^^^^
SyntaxError: Unexpected token function
    at createScript (vm.js:56:10)
    at Object.runInThisContext (vm.js:97:10)
    at Module._compile (module.js:542:28)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at fs.readdirSync.forEach (/Users/knb/workspace/github/koa-grace/middleware/index.js:9:21)
    at Array.forEach (native)
    at Object.<anonymous> (/Users/knb/workspace/github/koa-grace/middleware/index.js:6:25)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
[nodemon] app crashed - waiting for file changes before starting...

运行环境readme 应该说明下，即使没测试哪些环境运行，至少将自己的环境贴出来，跑不起来；

[xiongwilee]

注意：请确保你的运行环境中Nodejs的版本至少是v7.6.0 （或者你也可以考虑支持 Nodejs v4.x+ 的koa-grace v1.x）

快速开始的第一行有注明