我正在尝试更新cocoapods（不知何故我在版本1.0之前有版本）并且我收到此错误：ERROR: Could not find a valid gem 'cocoapods' (>= 0), here is why:
Unable to download data from https://rubygems.org/ - SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (https://api.rubygems.org/specs.4.8.gz) What is this error and how can I fix it?