sudo: false
cache: bundler
language: ruby
rvm:
 - 2.2.3
 - ruby-head
before_install:
  - gem update --system
  - gem install bundler --pre
matrix:
  allow_failures:
    - rvm: ruby-head

sudo: false
cache: bundler
language: ruby
rvm:
 - 2.2.3
 - 2.3.1
 - ruby-head
before_install:
  - gem update --system
  - gem install bundler --pre
matrix:
  allow_failures:
    - rvm: ruby-head

Add ruby 2.3.1 to build matrix
Add ruby 2.3.1 to build matrix
