get_bool and get_int in EnumProperty are undocumented and always return None

[fritzrehde]

When looking at EnumProperty's documentation that get_bool and get_int both always returned None.
My expectation of these way that I could set a bool in a property like so:

    #[strum(props(HideInHelp = "true"))]
    Variant,

and then I thought "true" would get parsed into a bool, and I could just check an Option<bool> with get_bool at runtime.
What I don't understand is why get_bool exists and always returns None. Is the feature not ready/implemented yet, and was accidentally added to the master branch? It should also probably be documented at least with a doc-string to prevent the confusion I ran into.
Thanks for the cool crate!