Ruby 2.3.7 is now available: https://www.ruby-lang.org/en/news/2018/03/28/ruby-2-3-7-released/
Ruby 2.3.8 is now available: https://www.ruby-lang.org/en/news/2018/10/17/ruby-2-3-8-released/
Red Hat does not currently plan to provide any further changes to this collection in a Red Hat Software Collections update release. This software collection is nearing the retirement date (May 2019) after which customers are encouraged to upgrade to a later release. Please contact Red Hat Support if you have further questions, or refer to the support lifecycle page for more information. https://access.redhat.com/support/policy/updates/rhscl/
In accordance with the Red Hat Software Collections Product Life Cycle, the support period for this collection has ended. New bug fix, enhancement, and security errata updates, as well as technical support services will no longer be made available for this collection. Customers are encouraged to upgrade to a later release. Please contact Red Hat Support if you have further questions, or refer to the support lifecycle page for more information. https://access.redhat.com/support/policy/updates/rhscl/