update rdiscount dependency
update rdiscount dependency

No reason to lock to ~> 2.0.7.

ipmobiletech/cucumber-rails,cucumber/cucumber-rails,cucumber/cucumber-rails,zillou/cucumber-rails,ipmobiletech/cucumber-rails,Kosmas/cucumber-rails,analog-analytics/cucumber-rails,Kosmas/mime-types-runtime-dependency,cucumber/cucumber-rails,analog-analytics/cucumber-rails,zillou/cucumber-rails,Kosmas/cucumber-rails