Support for Sidekiq 3.2

Hi. I want to use Sidekiq 3.2.1 (latest). What should I do to make autoscaler support Sidekiq 3.2? Thanks! 

Also I use transpec to update specs to RSpec 3.0.3 syntax. I have to install cupertino and transpec in the Gemfile due to an error: https://github.com/yujinakayama/transpec/issues/73.