Support PropertyForm metadata

[anjorinjnr]

I have property that I'm trying to ignore in json response

  @property.array(OAuth, {
    json: {
      out: false
    }
  })
  oauths: OAuth[];

I set the PropertyDefinition as shown above, but it doesn't seem to be having any impact. I also set it on the class not nada.

[bajtos]

I am afraid we don't support property forms yet.

@raymondfeng IIRC, it was you who introduced property forms like json: {out: false} to property definition metadata in LB4. Do you have any opinions on how to go about implementing them in current juggler or even better in @loopback/repository?

[bajtos]

Actually, let's move the discussion to loopback-next, where we already have an issue tracking this missing feature: loopbackio/loopback-next#2336