iOS安装更新cocoaPods
/Library/Ruby/Gems/2.0.0/gems/cocoapods-1.3.1/lib/cocoapods/command.rb:129:in `verify_minimum_git_version!': [!] You need at least git version 1.8.5 to use CocoaPods (Pod::Informative)
from /Library/Ruby/Gems/2.0.0/gems/cocoapods-1.3.1/lib/cocoapods/command.rb:49:in `run'
from /Library/Ruby/Gems/2.0.0/gems/cocoapods-1.3.1/bin/pod:55:in `