[ANN] Ruby 2.4.2, 2.3.5 and 2.2.8 ReleasedThey include several security fixes. Check!https://t.co/n5YD5R6OxYhttps://t.co/4AYOeIKud9— usa (@unak) 2017年9月14日 *** NOTICE ***We've just found a compatibility problem in Ruby 2.4.2 and 2.3.5 (…