Since 1.6.0 TypeVar with bound types fails to match with Callable of the same bound types

Bug Report

Did not occur prior to 1.6.0.

https://github.com/python-cmd2/cmd2/actions/runs/6699406223/job/18203570049
Got the following error with mypy:

cmd2/cmd2.py: note: In member "_build_parser" of class "Cmd":
cmd2/cmd2.py:699:46: error: Argument 1 has incompatible type "CommandParent"; expected "Union[Type[Cmd], Type[CommandSet]]"  [arg-type]
Found 1 error in 1 file (checked 18 source files)

where CommandParent is a TypeVar declared as:

CommandParent = TypeVar('CommandParent', bound=Union['cmd2.Cmd', CommandSet])

To Reproduce

https://github.com/python-cmd2/cmd2/blob/8d88c357ca0764b114c68d8175d2cd33146b83d7/cmd2/cmd2.py#L694

Expected Behavior

Since CommandParent is bound to the expected type, this shouldn't be an error

Actual Behavior

I get the error above.

Your Environment

• Mypy version used: 1.6.1
• Mypy command-line flags:
• Mypy configuration options from mypy.ini (and other config files):
• Python version used: 3.8, 3.9,3.10,3.11

Reproduce el fallo de cmd2/cmd2.py alrededor de la línea 694 usando mypy 1.6.1 y las versiones de Python indicadas. Compara el bound de TypeVar con el manejo de argumentos de Callable y, después, verifica que los tipos compatibles indicados ya no produzcan el error arg-type.