在成功安装 create-react-app 之后出现 command not found
~ ᐅ npm install -g create-react-app
/usr/local/bin/create-react-app -> /usr/local/lib/node_modules/create-react-app/index.js
+ create-react-app@2.0.4
updated 1 package in 3.676s
~ ᐅ creat-react-app my-project
zsh: command not found: creat-react-app