should there be a GovernorToken constructor/prototype?

[michaelficarra]

Currently, I don't see much use for it. Depending on how we go with #17, we may want something like

release() {
  this[Symbol.dispose]()
}

on it for convenience, but I don't know what else we'd do with it. I fear that if we don't have a built-in prototype and wanted to add a prototype later, it would not only be an observable change, but there's also be a lot of code that creates tokens that abide by the disposal protocol but do not inherit from the built-in prototype (because they predate it). Should we have a prototype even if there's nothing really on it?