This issue tracks progress for publishing a grpc-ruby package with a pre-built ruby 2.5 library.

Note currently, it should be possible to use grpc on ruby 2.5 by installing the source-only package and building the gem from source.

This is planned for the 1.9 release right now.

Remaining TODO's for this:

• Update Mac workers to be able to build against ruby 2.5 (and 2.1.6).