taro升级到2.0.3，提示错误。

23988848

升级到taro2之后，编译没有问题。

但是import进来的工具库，出现问题了，应该是webpack打包的问题，大家帮忙看看：

import Taro from '@tarojs/taro'
import buildUrl from 'build-url'
import { _ } from 'lodash'


vendors.js:6446 Uncaught TypeError: Cannot read property 'buildUrl' of undefined
    at vendors.js:6446
    at Object../node_modules/build-url/dist/build-url.js (vendors.js:6526)
    at __webpack_require__ (runtime.js? [sm]:80)
    at Object../src/utilities/fetch-data/index.js (vendors.js:18931)
    at __webpack_require__ (runtime.js? [sm]:80)
    at Object.srcPagesProductShowJsx (show.js? [sm]:28)
    at __webpack_require__ (runtime.js? [sm]:80)
    at checkDeferredModules (runtime.js? [sm]:46)
    at Array.webpackJsonpCallback [as push] (runtime.js? [sm]:33)
    at show.js? [sm]:1