Replace deprecated imp module with importlib

[hugovk]

Affected tool: olevba, mraptor, rtfobj, oleid, etc

oletools-0.60.1/oletools/thirdparty/xxxswf/xxxswf.py

Describe the bug

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.

How To Reproduce the bug Steps to reproduce the behavior, including the full command line or the options you used.

git grep "\bimp\b"

Expected behavior A clear and concise description of what you expected to happen.

Support Python 3.12 with importlib.