JSON::API v1.1 and `lid`

Hello,

First, thank you a lot for your amazing library @mattpolzin !

I don't know all the JSON::API v1.1 additions, but the lid member seems very interesting:

The id member is not required when the resource object originates at the client and represents a new resource to be created on the server. In that case, a client MAY include a lid member to uniquely identify the resource by type locally within the document.

Reference: https://jsonapi.org/format/1.1/#document-resource-objects

I often need sync data created on the device in my applications. So I use the type UUID for the id and sometimes it's created on the app side. Until now, the back-ends accept to the id member as the the id to save in the database... but it's not perfect... and I think that the new lid would be a lot better.

Do you have plan to allow to use JSON::API v1.1 with your library? Maybe I could try to implement this lid part, but I need to know your plan about the spec 1.1 before to start on this.

Start by reviewing the JSON:API v1.1 resource object specification, especially the lid member, then inspect the Swift library's current JSON:API support. The issue names no files or tests and asks for a plan, so the scope and completion criteria need maintainer clarification before implementation.