Resolve deprecated usage of bitwise operators on Python Boolean types

[emmanuel-ferdman]

PR Summary

This small PR resolves the deprecation warnings coming from the bitwise operators on Python Boolean types:

/Users/runner/work/porespy/porespy/test/unit/test_filters.py:28: DeprecationWarning: Bitwise inversion '~' on bool is deprecated and will be removed in Python 3.16. This returns the bitwise inversion of the underlying int object and is usually not what you expect from negating a bool. Use the 'not' operator for boolean negation or ~int(x) if you really want the bitwise inversion of the underlying int.

See CI logs for more information.

[jgostick]

I appreciate the PR @emmanuel-ferdman, but I'm a bit surprized this is only happen in one place. I just searched the code base for if ~ and found this usage is also on:

line 389 of _injection.py
line 81 of _ibip_gpu.py

I wonder what other search strings would turn up something?

[jgostick]

Just searching for ~ returns 217 usages. We use this regularly to invert numpy boolean images (which I really hope is not going to be deprecated!).