Fix serialisation validation about kitsu HOT 4 CLOSED

OK, that tells me everything I needed to know I think :-)

I will make a new PR as soon as I find time.

from kitsu.

PATCH and DELETE are the only ones that require an id
PATCH, POST and DELETE all require a type (and will be guessed if missing)

So other than the id, the validation should be identical as they all output the same structure.

from kitsu.

The validation here:

https://github.com/wopian/kitsu/blob/master/src/util/serialise/index.js#L31-L42

is only relevant for PATCH and PUT, since those are the only methods where you can attach relationships, right?

from kitsu.

POST can also have relationships (the PUT method is not used by JSON:API though)

http://jsonapi.org/format/#crud-creating

from kitsu.