code: function handleBuffer (file, encoding, cb) {
    const config = configParser(String(file.contents));
    holograph.holograph(config);
    return cb(null, file);
  }
docs: Run Hologram when given a buffer.
  
  @param {Object} file A Vinyl file.
  @param {String} encoding The file encoding.
  @param {Function} cb Called after hologram has run.
  @returns {Function} Executed callback.