@melissamforbs
@dgrijalva

could you please mention another maintainer so we can merge it?

Thanks

This seems to be a very specific use-case and personally I do not see a good reason to support something like this. You can always have a claims structure that looks like this (roughly)

type versionedClaims struct {
   jwt.RegisteredClaims
   V1 struct { /*... */ }
   V2 struct { /*... */ }
}

and then override UnmarshalJSON and MarshalJSON to fill the V1 or V2 properties based on an arbitrary property. The RFC itself does not specify any "version" variable or something similar.

Thanks for the PR, but this is a fairly specific use case, and I don't think it belongs in the core library.