**npm安装electron巨慢，报错，换了镜像源也不好使，一般都是网络超时导致的。
cmd窗口执行：（打开npm的配置文件）**
npm config edit在配置文件中粘贴，并保存：
registry=https://registry.npmmirror.com
electron_mirror=https://cdn.npmmirror.com/binaries/electron/
electron_builder_binaries_mirror=https://npmmirror.com/mirrors/electron-builder-binaries/参考下图
