Time.parse is not available in real-world use

see bottom of https://magnum.travis-ci.com/engineyard/ensemble/builds/1021850

    /home/travis/.rvm/gems/ruby-1.9.3-p448/gems/engineyard-cloud-client-1.0.12/lib/engineyard-cloud-client/models/deployment.rb:56:in `created_at=': undefined method `parse' for Time:Class (NoMethodError)

Is it ok to release a new version with this change