- update to 2.1.2:
* Added the following accessor methods for cmd2-specific attributes to the `argparse.Action` class
* `get_choices_callable()`
* `set_choices_provider()`
* `set_completer()`
* `get_descriptive_header()`
* `set_descriptive_header()`
* `get_nargs_range()`
* `set_nargs_range()`
* `get_suppress_tab_hint()`
* `set_suppress_tab_hint()`
* Now that `set_choices_provider()` and `set_completer()` have been added as methods to the
`argparse.Action` class, the standalone functions of the same name will be removed in version
2.2.0. To update to the new convention, do the following:
* Change `set_choices_provider(action, provider)` to `action.set_choices_provider(provider)`
* Change `set_completer(action, completer)` to `action.set_completer(completer)`
* Fixed handling of argparse's default options group name which was changed in Python 3.10
* Restored `plugins` and `tests_isolated` directories to tarball published to PyPI for `cmd2` release