vue 增加/删除版本号
在开发项目的过程中，可能我们不大想要打包之后的一大串后缀，这时候我们就可以在 webpack.prod.conf.js这个文件里把版本号去掉，这样打包之后的文件就显得简单明了
面临的问题：没有了版本号的控制，在我们重新发布新版本的时候，本地可能会有缓存现象，特别是微信端，缓存现象尤其突出，无论你怎样清理缓存，发现缓存现象依然存在，于是你迫不得已，忍痛割爱，只好默默的卸掉微信重新安装
文件路径： /build/webpack.prod.conf.js
output:{
path: config.build.assetsRoot,
filename: utils.assetsPath('js/[name].[chunkhash].js'),
chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
}
plugins: [
new ExtractTextPlugin({
filename: utils.assetsPath('css/[name].[chunkhash].css'),
// Setting the following option to `false` will not extract CSS from codesplit chunks.
// Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
// It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`,
// increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
allChunks: true,
}),
]
