rubygem-packaging_rake_tasks from devel:libraries:libyui:SLE-15:SP5 project

需要 openSUSE Leap 15.5 ，用 root 執行：

zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui:SLE-15:SP5/openSUSE_Leap_15.5/devel:libraries:libyui:SLE-15:SP5.repo
zypper refresh
zypper install rubygem-packaging_rake_tasks