官方最新提交的版本没有对端口冲突问题进行修复

目前官方已经更新修复

https://github.com/ElemeFE/page-skeleton-webpack-plugin/pull/101/commits/cd6e14af157bbee9d3442e7b5fd0df79c2b43ce3

_Originally posted by @yangfandashuaige in https://github.com/ElemeFE/page-skeleton-webpack-plugin/issues/97#issuecomment-497638104_

if (!this.server) {
const server = this.server = new Server(this.options) // eslint-disable-line no-multi-assign
server.listen().catch(err => server.log.warn(err))
}
这个判断代码在最新版本中并没有加上