sudo: false
language: ruby
cache: bundler
rvm:
  - 2.4.1
  - 2.3.4
  - 2.2.7
before_install: gem install bundler -v 1.15.1
script:
  - bundle exec rake ci

sudo: false
language: ruby
cache: bundler
rvm:
  - 2.4.1
  - 2.3.4
  - 2.2.7
  - ruby-head
before_install: gem install bundler -v 1.15.1
script:
  - bundle exec rake ci
matrix:
  allow_failures:
    - rvm: ruby-head

Test ruby-head on Travis allowing failures
Test ruby-head on Travis allowing failures

Refs #97
