proxy-keypath

创建一个能追踪当前keypath的特殊对象

这样你就能实现一些有趣的api设计，例如

``javascript
const keypath = require('proxy-keypath');
const fetch = require('node-fetch');

async function main() {
const www = keypath('https://www', {
async get() {
return fetch(${this});
},
});

const resp = await www.google.com.get();
const text = await resp.text();
console.log(text);
}

main()
``