There are no tests covering cursor.end(). It's also a weird method to have on the cursor as it terminates the connection to postgres internally. I don't recall why I added this method in the first place but its not correct to close a connection to postgres by calling .end on a cursor...seems like a pretty big footgun. If you have a pooled client and you call `cursor.end` it'll close the client internally and likely confuse the pool. Plus it's just weird to be able to close a connection by calling .end on a query or cursor. So...I'm deprecating that method.
