Add ability to map different types of objects

[ealeksandrov]

No description provided.

[jamesbrooks]

From a quick skim, does this allow the use of a protocol rather than subclassing JSONAPIResourceBase? If so a big 👍 :)

[joshdholtz]

@jamesbrooks Ahhh, that would be huge
@ealeksandrov Can you confirm? And are there any tests that can be added and updated for this?

[ealeksandrov]

@jamesbrooks Not quite that. This is about supporting different kinds of objects for one relationship property.

Added both mapping and serialization support.
Tests also added.

[jkrumow]

@joshdholtz Can we please merge this PR?

It adds support for polymorphic types which many API implementations are using.

As discussed here: json-api/json-api#862

[joshdholtz]

@ealeksandrov @tarbrain Yes yes, thanks for pinging me 😊 Will merge this and push a pod update this morning 👍

[joshdholtz]

@ealeksandrov Thanks for the contribution 🙌 Happy holidays!

[jkrumow]

Thanks 👍

[joshdholtz]

1.0.3 should be up on CocoaPods now!