Cache dependencies on Travis + test ruby 2.2.x
Cache dependencies on Travis + test ruby 2.2.x

komal0708/spree_mail_settings,sunny2601/spree_mail_settings,komal0708/spree_mail_settings,spree-contrib/spree_mail_settings,spree-contrib/spree_mail_settings,Hates/spree_mail_settings,Hates/spree_mail_settings,Hates/spree_mail_settings,sunny2601/spree_mail_settings,spree-contrib/spree_mail_settings,komal0708/spree_mail_settings,sunny2601/spree_mail_settings