taro 生产drop console配置

原文地址 juejin.cn/post/685041…

const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
webpackChain(chain, webpack){      
    chain.plugin('uglifyjs-webpack-plugin')      
    .use(UglifyJsPlugin, [{
        uglifyOptions: {          
            compress: {            
                warnings: false,           
                drop_console: true,//console
                pure_funcs: ['console.log']//移除console
            }
        }
    }])    
}