When keys are transformed, the values of "type" attributes should be transformed in the same way

[rthbound]

Expected behavior vs actual behavior

When keys are transformed (e.g., json api spec defaults to dasherized keys), the values of type attributes should be transformed in the same way.

Steps to reproduce

See the modifications to tests made here: master...rthbound:bug-in-1574

I believe this was introduced in #1574.

[snwfog]

Looks like this is a dup from #1612

[rthbound]

@snwfog I think you're right. Good eye. I'll close this one.