【工具】requires CocoaPods version `

[!] `CryptoSwift` requires CocoaPods version `>= 1.6.0`, which is not satisfied by your current version, `1.5.3`.

解决方法
1、bundle install／bundle update
2、在~/.bash_profile添加

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"