v0.2.0

• Public toWire() port on SchemaInterface: the PHP→wire projection is
  out of Internal\ — an enum instance becomes its backed value, containers
  convert recursively, a transform's declared wire callback is applied,
  everything else passes through. The inverse pair of arbitrary():
  generated or parsed PHP values handed to queues, HTTP and JSON storage.
  Found by the first consumer pilot (keppio): a queue property test needed
  exactly this projection. Law 2 now dogfoods the public port.