function gzip(input, options) {
  options = options || {};
  options.gzip = true;
  return deflate$1(input, options);
}
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.