CI against Ruby 2.4.9, 2.5.7, 2.6.5
CI against Ruby 2.4.9, 2.5.7, 2.6.5

https://www.ruby-lang.org/en/news/2019/10/02/ruby-2-4-9-released/
https://www.ruby-lang.org/en/news/2019/10/01/ruby-2-5-7-released/
https://www.ruby-lang.org/en/news/2019/10/01/ruby-2-6-5-released/

yatmsu/guard-haml-lint,yatmsu/guard-haml-lint