axios-callback v1.0.1

本包沿用全部axios特性，只做了callback回调风格的简单封装。以下是示例代码：

const httprequest = require('axios-callback')
httprequest({
  method: 'GET',
  url: 'https://api.example.com/test',
  success(res) {
    console.log(res)
  },
  fail(err) {
    console.log(err)
  }
})