language: ruby
rvm:
  - 2.2.6
  - 2.3.3
  - 2.4.0
  - ruby-head
matrix:
  allow_failures:
    - rvm: ruby-head

language: ruby
rvm:
  - 2.2.6
  - 2.3.3
  - 2.4.0
  - ruby-head
matrix:
  allow_failures:
    - rvm: ruby-head
before_install:
  - gem update --remote bundler
  - gem update --system

Upgrade RubyGems and Bundler (fixes "frozen string" error)
Upgrade RubyGems and Bundler (fixes "frozen string" error)
