Consider updating fast_jsonapi to jsonapi-serializer

[benediktms]

The fast_jsonapi gem is no longer maintained by Netflix, as stated on the GitHub repo. Consider updating the content to reflect the jsonapi-serializer gem which is a community maintained fork.

[madeindjs]

Good to know, I was not aware about this. Thanks for report.

[promisepreston]

Hi @madeindjs, are you working on this at the moment, or can I help out with updating it?

[madeindjs]

Hi @promisepreston , I not working on this for the moment so you can make a PR if you want it. If you do so, don't forget to add you name in contributors ;)

[promisepreston]

I have opened some pull requests that addresses this.

[madeindjs]

Closed by #57 , thank you again @promisepreston