language: ruby rvm: - 2.3 - 2.4 - 2.5 - 2.6 - 2.7 - jruby-9.1.5.0 - ruby-head env: - COVERAGE=1 cache: - bundler matrix: allow_failures: - rvm: ruby-head - rvm: jruby-9.1.5.0 before_install: - gem update --system - gem install bundler