Added

• support for groups of options and commands in the help using low-level .helpGroup() on Option and Command, and higher
  -level .optionsGroup() and .commandsGroup() which can be used in chaining way to specify group title for following option
  s/commands (#2328)
• support for unescaped negative numbers as option-arguments and command-arguments (#2339)
• TypeScript: add parseArg property to Argument class (#2359)

Fixed

• remove bogus leading space in help when option has default value but not a description (#2348)
• .configureOutput() now makes copy of settings instead of modifying in-place, fixing side-effects (#2350)

Changed

• Breaking: Commander 14 requires Node.js v20 or higher
• internal refactor of Help class adding .formatItemList() and .groupItems() methods (#2328)