MAC OS安装gitbook

环境：macOS Mojave 10.14.3
安装gitbook各种失败， npm ERR! enoent ENOENT: no such file or directory, rename '/usr/local/lib/node_modules/gitbook-....

解决方法：

1. remove npm: sudo npm uninstall npm -g
2. install npm: brew install npm
3. update node: brew upgrade node
4. install gitbook: sudo npm install gitbook-cli -g
5. check gitbook: gitbook current, it shows: GitBook version is 3.2.3

我的npm版本：

liuweizhendeMacBook-Pro:~ liuweizhen$ npm -v
6.7.0
liuweizhendeMacBook-Pro:~ liuweizhen$ node -v
v11.10.1