- yaml/json dump kwargs can now be changed via attributes dump_yaml_kwargs and dump_json_kwargs.
- Add argument with type Enum or type hint giving an action now raises error #45.
- Now by default dump/save/print_config preserve the add arguments and argument groups order (python>=3.6) #46.
- ActionParser group title now defaults to None if not given #47.

… config file was loaded #47.

- get_default method now also considers default_config_files.
- get_defaults now raises ParserError if default config file not valid.
- default_config_files property not removing help group when setting None.
- Improved Path class home prefix '~' support.

…ows.