xopen does not support .zst file compressed with Zstandard long memory mode

When compressing a file with long memory mode `zstd -T4 -9 --force --rm --exclude-compressed --no-progress --long=31 file.txt` Xopen cannot decode it ``` python3 -c 'import xopen; f = xopen.xopen("file.txt.zst"); f.readline()' Traceback (most recent call last): File "<string>", line 1, in <module> zstd.ZstdError: zstd decompress error: Frame requires too much memory for decoding ``` ``` zstd -vl file.txt.zst *** Zstandard CLI (64-bit) v1.5.5, by Yann Collet *** tmpz/ip2ip_final.rpt.zst # Zstandard Frames: 1 DictID: 0 Window Size: 1.18 GiB (1264573175 B) Compressed Size: 27.6 MiB (28914291 B) Decompressed Size: 1.18 GiB (1264573175 B) Ratio: 43.7352 Check: XXH64 d5d984dc ``` It seems the way to address this is [here in the lower level zstandard library](https://stackoverflow.com/questions/69270987/how-to-resolve-the-error-related-to-frame-used-in-zstandard-which-requires-too-m).