tone is a cross platform audio tagger and metadata editor to dump and modify metadata for a wide variety of formats, including mp3, m4b, flac and more. It has no dependencies and can be downloaded as single binary for Windows, macOS, Linux and other common platforms.
Ah crap, forgot to update the version string. Thank you for reporting this... Should be fixed now (please ensure to re-download an uncached version of the file).
As you can see, it reports the wrong version number.