WavSteg: update to support higher sample widths (python3.12)

[TheoSignore]

Python3.12's wave module now supports higher sample widths.

Locally, I managed to modify WavSteg.py so it can handle a 24 bit sample width 44100Hz .wav file, with an lsb-count of 1.
Both hiding and recovering worked well.

My knowledge of python is limited and my tests were few, so I'd rather not submit the ugly fix I made as a pull request.

Here is a summary anyway:
WavSteg.py: Both in hide_data() and recover_data()
If a sample_width of 3 is detected, change it to 4

34  sample_width = sound.getsampwidth()
35         if sample_width == 3:
36             sample_width = 4;

The if protecting the maximum sample_width must be changed as well

[ragibson]

I'll need to look over the scope of the change in wave and can take a pass at this the next chance I get.

The override of sample width from 3 to 4 seems a bit strange, but perhaps the code called is just interpreting the samples as (zero-padded) 32-bit values and then truncating back when saving.

[ragibson]

This has been fixed in v1.6.0 by extending all the library's bit manipulations to allow non power of two byte depths.

[TheoSignore]

Perfect ! Thank you for your work and your time.