docs: function buildPack(webpackConfig, cb, spinnerText) {
    var spinner = ora(spinnerText || 'building for uncompressed files...')
    spinner.start()
    webpack(webpackConfig, function (err, stats) {
      spinner.stop()
      if (err) {
        throw err
      }
      process.stdout.write(stats.toString({
        colors: true,
        modules: false,
        children: false,
        chunks: false,
        chunkModules: false
      }) + '\n')
      cb && cb()
    })
  }