language: ruby
rvm:
  - 1.8.7
  - 1.9.3
  - 2.3.1

language: ruby
rvm:
  # - 1.8.7
  # - 1.9.3
  - 2.3.1

Disable CI on old Rubies.
Disable CI on old Rubies.

Not sure how to test on older Ruby versions, so leaving it for now.
