language: ruby
rvm:
  - 2.3.0
  - 2.5.0
before_install: gem install bundler -v 1.10.6

language: ruby
rvm:
  - 2.3.0
  - 2.5.0
before_install: gem install bundler -v 1.16.1

Update bundler version defined in TravisCI config
Update bundler version defined in TravisCI config
