language: ruby
rvm:
  - 2.0.0
  - 1.9.3
addons:
  code_climate:
    repo_token: 6b9b2949be0934c1ef9c1b4db4ec1568e616d56c9c493ff470fd70dda0d96a08

language: ruby
rvm:
  - 2.2.6
  - 2.3.3
  - 2.4.0
install:
  - gem update --system
  - bundle install --jobs=3 --retry=3
addons:
  code_climate:
    repo_token: 6b9b2949be0934c1ef9c1b4db4ec1568e616d56c9c493ff470fd70dda0d96a08

Update Travis config to use trailing 3 ruby versions and latest rubygems
Update Travis config to use trailing 3 ruby versions and latest rubygems

Without latest rubygems, bundle install fails with a frozen string error.
