Replace deprecated imp module with importlib

[hugovk]

This project uses the imp module which has been deprecated since Python 3.4 and removed in 3.12:

• Raised PendingDeprecationWarning since 3.4 (2014)
• Raised DeprecationWarning since 3.5 (2015)
• Updated DeprecationWarning to say removal in 3.12 since 3.10 (2021)
• Removal planned for 3.12 (2023)

Python 3.12 is set for release on 2023-10-02 and this library is one of the top 5,000 most-downloaded from PyPI.

Please could you upgrade to use importlib? The imp docs have suggestions on what to use to replace each function and constant.

[mdmintz]

@hugovk where do you see import imp in this codebase? The pynose repo already fixed the issues of the older nose repo.

[hugovk]

It's here:

https://github.com/mdmintz/pynose/blob/4e0d2bb475cdf46577c66b6dea9923877ccb09e6/nose/importer.py#L10

https://github.com/mdmintz/pynose/blob/4e0d2bb475cdf46577c66b6dea9923877ccb09e6/nose/importer.py#L65-L81

[mdmintz]

Fixed in 1.4.3 - https://github.com/mdmintz/pynose/releases/tag/v1.4.3