rubygem-aws-eventstream from home:crameleon:LibertaCasa:Mastodon project

需要 15.4 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/home:crameleon:LibertaCasa:Mastodon/15.4/home:crameleon:LibertaCasa:Mastodon.repo
zypper refresh
zypper install rubygem-aws-eventstream