Update go library to use the latest version of the JWT library.
The underlying JWT library had some breaking changes that percolated up to this one:
- `jwt.StandardClaims` was deprecated in v4 and removed in v5, replaced with `jwt.RegisteredClaims`. If you referenced `AuthenticationToken.StardardClaims` directly, then you will have to change that to `AuthenticationToken.RegisteredClaims`.
- `jwt.NewValidationError` was removed. Replaced by new errors in the edgecontext library and additional checks in the `ParseWithClaims` call. This may affect you if you were checking the errors returned by `ParseWithClaims`, specifically check `errors.As` against a `*jwt.VerificationError`. This type was completely removed, so you will need to check against specific errors, either the errors from the JWT library or the new ones added in here.