Ability to pass options when deleting an item

Additional options such as `:send_meeting_cancellations` were [already supported in the core](https://github.com/WinRb/Viewpoint/blob/e77191d7cb1205768180f93fa88fbfbb9b599a6b/lib/ews/soap/exchange_data_services.rb#L234-235) but there was no mechanism for passing them to [Item#delete!](https://github.com/WinRb/Viewpoint/blob/e77191d7cb1205768180f93fa88fbfbb9b599a6b/lib/ews/types/item.rb#L97).