错误提示如下：
npm install -g @bchatard/alfred-jetbrains
npm ERR! code ENOTFOUND
npm ERR! errno ENOTFOUND
npm ERR! network request to https://registry.npmjs.org/@bchatard%2falfred-jetbrains failed, reason: getaddrinfo ENOTFOUND registry.npmjs.org
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly. See: 'npm help config'
npm ERR! A complete log of this run can be found in:
npm ERR! /Users/xiangrui/.npm/_logs/2020-01-04T17_28_43_142Z-debug.log
意思就是连接不上 https://registry.npmjs.org，在浏览器里访问这个网址果然访问不，是用手机访问 https://registry.npmjs.org 竟然可以访问，那么试着手机开个热点，电脑连上手机的网络，npm install -g @bchatard/alfred-jetbrains，成功了！
记得可以试试浏览器请求 https://registry.npmjs.org/
