sudo: false
language: ruby
rvm:
  - 2.1
  - 2.2
  - 2.3.1
  - 2.4.0
before_install: gem install bundler -v 1.13.7

sudo: false
language: ruby
rvm:
  - 2.1
  - 2.2
  - 2.3.1
  - 2.4.0
before_install: gem install bundler -v '~> 1.14' --conservative

Use latest Bundler in Travis
Use latest Bundler in Travis
