Update spservice.ts to fix delete events
Update spservice.ts to fix delete events

Change the RecurrentID to Date type
Some fixes for RecurrentID in some places since it became a Date Type
applied SharePoint Standard functionality for deleting one occurrence of recurrent event by adding prefix "Deleted"
AJIXuMuK/sp-dev-fx-webparts,AJIXuMuK/sp-dev-fx-webparts,AJIXuMuK/sp-dev-fx-webparts