language: ruby
rvm:
  - "1.9.3"
  - "2.0.0"
  - "2.1.8"
  - "2.2.4"
  - "2.3.0"
before_install:
  - gem update bundler

language: ruby
rvm:
  - "1.9.3"
  - "2.0.0"
  - "2.1.10"
  - "2.2.7"
  - "2.3.4"
  - "2.4.1"
before_install:
  - gem update bundler

Use the latest Rubies on Travis CI
Use the latest Rubies on Travis CI
