message: build: fix vant-doc webpack config
diff: const path = require('path');
  -const baseWebpackConfig = require('../../../build/webpack.dev');
  +const baseWebpackConfig = require('../../../build/webpack.pkg');
  module.exports = Object.assign(baseWebpackConfig, {
  - mode: 'production',
  entry: {
  index: './src/index.js'
  },
  @@ -10,13 +9,5 @@ module.exports = Object.assign(baseWebpackConfig, {
  path: path.resolve(__dirname, '../lib'),
  filename: '[name].js',
  libraryTarget: 'commonjs2'
  - },
  - externals: {
  - vue: {
  - root: 'Vue',
  - commonjs: 'vue',
  - commonjs2: 'vue',
  - amd: 'vue'
  - }
  }
  });
  