v2.3.0

Features:

• (#203) Added -tok flores101 and -tok flores200, a.k.a. spbleu.
  These are multilingual tokenizations that make use of the
  multilingual SPM models released by Facebook and described in the
  following papers:
  • Flores-101: https://arxiv.org/abs/2106.03193
  • Flores-200: https://arxiv.org/abs/2207.04672
• (#213) Added JSON formatting for multi-system output (thanks to Manikanta Inugurthi @me-manikanta)
• (#211) You can now list all test sets for a language pair with --list SRC-TRG.
  Thanks to Jaume Zaragoza (@ZJaume) for adding this feature.
• Added WMT22 test sets (test set wmt22)
• System outputs: include with wmt22. Also added wmt21/systems which will produce WMT21 submitted systems.
  To see available systems, give a dummy system to --echo, e.g., sacrebleu -t wmt22 -l en-de --echo ?