language: ruby
cache: bundler
rvm:
- 1.8.7
- 1.9.3
- '2.0'
- '2.1'
- '2.2'
- '2.3'

language: ruby
before_install:
  - gem install bundler -v 1.11.2
cache: bundler
rvm:
- 1.8.7
- 1.9.3
- '2.0'
- '2.1'
- '2.2'
- '2.3'

Update bundler for Travis CI
Update bundler for Travis CI

https://github.com/travis-ci/travis-ci/issues/5239
