sudo: false
language: ruby
cache:
  - bundler
rvm:
  - 2.1
  - 2.2
  - 2.3.0
script:
  - bundle exec rspec
  - mkdir /home/travis/bin
  - echo 'echo $@' > /home/travis/bin/bcn
  - chmod +x /home/travis/bin/bcn
  - bundle exec bin/bcnd

sudo: false
language: ruby
cache:
  - bundler
rvm:
  - 2.2
  - 2.3.4
  - 2.4.1
script:
  - bundle exec rspec
  - mkdir /home/travis/bin
  - echo 'echo $@' > /home/travis/bin/bcn
  - chmod +x /home/travis/bin/bcn
  - bundle exec bin/bcnd

Drop support for ruby 2.1, add support for 2.4
Drop support for ruby 2.1, add support for 2.4
