language: ruby
rvm:
  - 2.2.7
  - 2.3.4
  - 2.4.1
  - jruby-9.1.8.0

script: bundle exec rake spec

language: ruby
rvm:
  - 2.2.8
  - 2.3.5
  - 2.4.2
  - jruby-9.1.13.0

script: bundle exec rake spec

Update Ruby versions for Travis CI
Update Ruby versions for Travis CI

This includes the latest minor/patch releases for all versions
(particularly MRI due to its recent security releases).
