master
language: ruby cache: bundler rvm: - 2.2.5 - 2.3.3 - 2.4.0 - ruby-head - jruby-9.1.6.0 - jruby-head before_install: - gem install bundler matrix: allow_failures: - rvm: ruby-head - rvm: jruby-head addons: apt: packages: - graphviz