DeprecationWarnings related to SWIG types when running tests on Python 3.12

[michaeltryby]

Issue Type: Bug

Description:
When running unit tests for this repository on Python 3.12 (all operating systems), a series of DeprecationWarnings are displayed:

<frozen importlib._bootstrap>:488
<frozen importlib._bootstrap>:488
  <frozen importlib._bootstrap>:488: DeprecationWarning: builtin type SwigPyPacked has no __module__ attribute
<frozen importlib._bootstrap>:488
<frozen importlib._bootstrap>:488
  <frozen importlib._bootstrap>:488: DeprecationWarning: builtin type SwigPyObject has no __module__ attribute
<frozen importlib._bootstrap>:488
  <frozen importlib._bootstrap>:488: DeprecationWarning: builtin type swigvarlink has no __module__ attribute

See: https://docs.pytest.org/en/stable/how-to/capture-warnings.html

Steps to Reproduce:

• Run the unit tests with Python 3.12 on any operating system.

Additional Notes:

• Not sure about other Python versions.
• These warnings may be related to underlying SWIG bindings.

[karosc]

I think should be fixed in the next release of swig. See swig/swig#2881 (comment)

[karosc]

more info here. I think 4.4.0 will be released ahead of python 3.14....hopefully.