function gunzipSync(data, opts) {
    var st = gzs(data);
    if (st + 8 > data.length)
        err(6, 'invalid gzip data');
    return inflt(data.subarray(st, -8), { i: 2 }, opts && opts.out || new u8(gzl(data)), opts && opts.dictionary);
}
Expands GZIP data
@param data The data to decompress
@param opts The decompression options
@returns The decompressed version of the data