Merge pull request zendesk#415 from toru-takahashi/patch-1

Add "update many" to users

Author: nogates

lib/zendesk_api/resources.rb

@@ -599,6 +599,7 @@ class GroupMembership < Resource
 
  class User < Resource
  extend CreateMany
+ extend UpdateMany
  extend CreateOrUpdate
  extend CreateOrUpdateMany
  extend DestroyMany