--config fantomas-config.json gives error

[knocte]

fantomas --config fantomas-config.json foo.fs throws the error:

Couldn't process one or more Fantomas configuration files, falling back to the default configuration
System.ArgumentException: Path cannot be the empty string or all whitespace. (Parameter 'path')
   at System.IO.Directory.GetParent(String path)
   at Fantomas.ConfigFile.findConfigurationFiles(String fileOrFolder) in /home/runner/work/fantomas/fantomas/src/Fantomas/ConfigFile.fs:line 29
   at Fantomas.CodeFormatterImpl.readConfiguration(String fileOrFolder) in /home/runner/work/fantomas/fantomas/src/Fantomas/CodeFormatterImpl.fs:line 678

Expected results: should act like if config file path supplied was ./fantomas-config.json, i.e. the ./ should be by default if not prepended.