I'd prefer not to use `Forwardable` because of things like [this](https://twitter.com/steveklabnik/status/383345102594117633) can happen: due to RSpec requiring `forwardable`, users may forget to in their gems, and essentially ship a broken gem even though their tests pass (in this specific case, it was bundler requiring `forwardable`, not RSpec, but the point stands).  This is a fine line (if we followed it to the extreme, RSpec wouldn't be able to require _anything_), but is a point worth considering, I think.

Besides, you are only delegating two things. Using forwardable isn't buying us much here over manual delegation.