[metamask] counterfactual:request:matchmake is responding with JSONAPI payload

[joelalejandro]

We could probably return the attributes object's content instead of the typical JSONAPI envelope.

[Alonski]

@joelalejandro This returns it this way because this was how the dApps were retrieving the data. We would need to fix this in both places :)
BTW should this issue live in the monorepo or in the MM fork?

[joelalejandro]

@Alonski Unfortunately, we can't create issues on the MM fork, I think forks aren't allowed to have issues. So I'm putting these here.

And yes, we'd have to fix the dapps as well. :)