Encode dryads in properties in json notation without sc.h

[crucialfelix]

This is for when you have a Dryad supplied as a property to another Dryad.

Currently in a hyperscript document there is no way to tell if it is supposed to be an array or a Dryad

[
  "synth",
  {
    "args": {
      "freq": ["lfo", {"freq": 20}],
      "pan": [-1, 1]
    }
  }
]

The freq should be interpreted as a Dryad; but the pan should be interpreted as an array. You could say that an array with [string, object, array] is a dryad and for the rare case where you needed to pass that as an actual array then escape it with:

['array', ['something', {}, []]]

or just don't worry about this rare case for now.