Use `inspect.custom` for BatchId, Bytes, etc.

[Cafe137]

Goal

When Swarm primitives are printed to the console (node or browser), they should be represented as hex strings rather than raw object dumps of hard-to-read bytes

Example

Applies to all primitives, such as BatchIds, Bytes, etc.

const id = new BatchId('ab'.repeat(32))

console.log(id)
console.log({ id })
console.log(JSON.stringify({ id }))

Actual:

BatchId {
    bytes: Uint8Array(32) [
      171, 171, 171, 171, 171, 171,
      171, 171, 171, 171, 171, 171,
      171, 171, 171, 171, 171, 171,
      171, 171, 171, 171, 171, 171,
      171, 171, 171, 171, 171, 171,
      171, 171
    ],
    length: 32
}

{
    id: BatchId {
      bytes: Uint8Array(32) [ … same 32 entries … ],
      length: 32
    }
}

SyntaxError: Unexpected token '«', "««««««««««"... is not valid JSON

Expected:

  abababababababababababababababababababababababababababababababab
  { id: 'abababababababababababababababababababababababababababababababab' }
  {"id":"abababababababababababababababababababababababababababababababab"}