In the gemspec we currently have: required_ruby_version = '>= 1.9.2'. The latest maintained ruby is 2.4.

Should we bump up the version of ruby in the gemspec? If not all the way to 2.4 (a bit harsh). maybe at least to 2.2 or (my preference) 2.3?

Requiring a more modern ruby would make things like testing and linting easier, and it would allow us to use nice (and more performant) features as well.

Thoughts (especially @jdleesmiller)?