language: ruby
matrix:
  allow_failures:
    - rvm: ruby-head
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - ruby-head

language: ruby
matrix:
  allow_failures:
    - rvm: ruby-head
rvm:
  - 1.9.3
  - 2.0.0
  - 2.1.0
  - 2.2.5
  - 2.3.1
  - ruby-head

Update ruby versions for Travis CI
Update ruby versions for Travis CI
