language: ruby
sudo: false
cache: bundler
rvm:
  - 2.1
  - 2.2
  - 2.3.0
  - ruby-head
matrix:
  allow_failures:
    - rvm: ruby-head

language: ruby
sudo: false
cache: bundler
rvm:
  - 2.1.10
  - 2.2.6
  - 2.3.3
  - 2.4.0
  - ruby-head
matrix:
  allow_failures:
    - rvm: ruby-head

Update Ruby versions for test in Travis CI
Update Ruby versions for test in Travis CI
