Lonley Hash property aliasing does not work

[monicao]

Using v1.6.0.

require 'representable/json/hash'

module SongRepresenter
  include Representable::JSON::Hash

  property :title, as: :name
  property :track
end

song = {"title" => "Fallout", "track" => 1}

song.extend(SongRepresenter).to_json
# => {"title":"Fallout","track":1}
# expecting: {"name":"Fallout","track":1}

This works fine for normal objects, but when using a lonely hash, the aliasing does not work.