code: function write (path, data, options) {
    const Promise = promise(options)
  
    return new Promise((resolve, reject) => {
      streamify(data, options)
        .pipe(fs.createWriteStream(path, options))
        .on('finish', () => {
          resolve()
        })
        .on('error', reject)
        .on('dataError', reject)
    })
  }
docs: Public function `write`.
  
  Returns a promise and asynchronously serialises a data structure to a
  JSON file on disk. Sanely handles promises, buffers, maps and other
  iterables.
  
  @param path:           Path to the JSON file.
  
  @param data:           The data to transform.
  
  @option space:         Indentation string, or the number of spaces
  to indent each nested level by.
  
  @option promises:      'resolve' or 'ignore', default is 'resolve'.
  
  @option buffers:       'toString' or 'ignore', default is 'toString'.
  
  @option maps:          'object' or 'ignore', default is 'object'.
  
  @option iterables:     'array' or 'ignore', default is 'array'.
  
  @option circular:      'error' or 'ignore', default is 'error'.
  
  @option yieldRate:     The number of data items to process per timeslice,
  default is 16384.
  
  @option bufferLength:  The length of the buffer, default is 1024.
  
  @option highWaterMark: If set, will be passed to the readable stream constructor
  as the value for the highWaterMark option.
  
  @option Promise:       The promise constructor to use, defaults to bluebird.