Ruby 2.1.3 was just announced today, and is now available on Packager.io for all distributions.
Have a look at the documentation if you want to try the latest and greatest!
Packager.io is a hosted continuous integration platform that allows you to build and publish Linux packages for your software, directly from your Github repository, without you knowing anything about deb or rpm packaging.
Ruby, Node.js, and Go apps are currently supported, and you can generate and publish public or private packages for Debian 7/8, Ubuntu 12.04/14.04/16.04, RHEL/CentOS 6/7, and SLES 11/12. Packaging made simple!