code: function gzip(input, options) {
    options = options || {};
    options.gzip = true;
    return deflate(input, options);
  }
docs: gzip(data[, options]) -> Uint8Array|Array|String
  - data (Uint8Array|Array|String): input data to compress.
  - options (Object): zlib deflate options.
  
  The same as [[deflate]], but create gzip wrapper instead of
  deflate one.