Use new modular `winrt` packages

[Safihre]

Thanks for creating this great project, it is exactly what we need for our application SABnzbd. Took me much longer to find because somehow those old-fashioned projects are found much quicker!

I saw you created your own fork of pywinrt, because indeed it used to be 1 giant winsdk package.
However, they now publish all bindings to PyPi in a modular fashion, so each binding can be downloaded separately.
For example: https://pypi.org/search/?q=%22winrt-Windows%22&o=

Would you consider moving the project to use those instead of toasts-winrt?
I'm asking this for maintainability reasons, in case in the future you don't have spare time anymore to maintain toasts-winrt, we can just rely on the updates provided by pywinrt.

Thanks so much!

[Safihre]

I can also create a PR for this if you prefer that?

[DatGuy1]

I should be able to tackle this over the weekend.