Use with Koa/Http module
```js
const unvue = require('unvue')
const Koa = require('koa')
const Router = require('koa-router')

const handle = unvue.getRequestHandler()
const app = new Koa()
const router = new Router()

router.get('*', ctx => {
  handle(ctx.req, ctx.res)
})
```