Update import for Generator and Callable types

[OriolAbril]

Several of these types have been deprecated from typing to the ones in collections.abc.
If you want to leave this open a bit I can add more if there were as I notice them while I try the
library, otherwise I can do other PRs, whatever makes your life easier.

[lagru]

Good catch! I'm curious how you stumbled on these? Perhaps I'm missing a linter that should have caught these. E.g. I guess at the very least mypy should have complained in the CI? 🤔

Anyway, I'm very happy reviewing PRs as they come. Thank you. 😊

[OriolAbril]

Manual inspection. I was curious about how the yield section had been processed and in the stubs I saw Sequence, Iterable and some other input types were imported from collections.abc (without me defining those imports) while Generator was being imported from typing and was surprised about the difference. After checking and seeing the deprecation I searched for similar imports from the typing module and found the Callable one and the test using Sequence from typing.