Boolean type

[feross]

Is there any interest in adding support for a Boolean type? If you think this fits, I can PR it.

I implemented it like this:

function encode (value, buffer, offset) {
  if (typeof value !== 'boolean') throw new TypeError('value must be a boolean')
  if (!buffer) buffer = Buffer.allocUnsafe(1)
  if (!offset) offset = 0
  buffer.writeUInt8(Number(value), offset)
  return buffer
}

function decode (buffer, offset, end) {
  if (!offset) offset = 0
  if (!end) return Boolean(buffer.readUInt8(offset))
  return Boolean(buffer.slice(offset, end).readUInt8(0))
}

function encodingLength () {
  return 1
}

encode.bytes = decode.bytes = 1

export const VBoolean = {
  encode,
  decode,
  encodingLength
}