Lens does not support relation setting via alias fields

[AndrewSisley]

e.g. with schema:

type Users {
	company: Companies
	name: String
}

Setting company_id via a lens migration will successfully link the two documents, however setting company will not.

Given that the query system supports linking via company, I think Lens should too, or it will trip up users. Whilst I think this will be very easy from the primary side, this may be more complex from the secondary side of a one-one.