brew reinstall cocoapods
brew install ruby
brew link --overwrite cocoapods
最近将Mac OS升级到10.15.1 ,再回来初始化rn项目时，卡在Pod处，决定试试指定0.60.0版本初始化
过程参考了：
https://gitee.com/damon-s/boost-for-react-native
https://www.jianshu.com/p/3b70b4a87afd
https://www.jianshu.com/p/966b6a161f4c