Adding state data list

To test this locally:

bundle
bundle exec irb
require 'Cb'
require 'pry'

Cb.configure do |config|
  config.dev_key    = 'GetYourOwnDevKey'
  config.time_out  = 30
  config.debug_api  = true
end

input = {country_code: 'US'}
client = Cb::Client.new
request = Cb::Requests::State::Get.new(input)
response = client.execute(request)
yep, that is the idea.  Since this is the API gem the chance of the url changing is very very low (if it changes it will probably be a new version of the api and need a new request anyway) thus this being this way is not bad.