无法安装gosu ruby gem。当我尝试运行
gem install gosu
它抛出此错误：
Could not find a valid gem 'gosu' (>= 0), here is why:
Unable to download data from https://rubygems.org/ - SSL_connect returned=1 errno=0 state=SSLv2/v3
read server hello A: tlsv1 alert protocol version
(https://rubygems.org/latest_specs.4.8.gz)
如何安装此gem？