Openstruct has been removed from rails specs. Lets require ourselves. (…

…#139)

spec/spec_helper.rb

@@ -7,6 +7,7 @@
 require 'api_struct'
 require 'uploadcare'
 require 'action_view'
+require 'ostruct'
 
 Dir[File.expand_path(File.join(File.dirname(__FILE__), 'support', '**', '*.rb'))].sort.each { |f| require f }