Matplotlib version parsing crashes import #344
Description
Describe the bug:
If MHKiT happens to be installed in an environment with a version of Matplotlib what contains non-integer characters (e.g., version 3.9.1.post1), then MHKiT will crash on import because it tries to parse the version number by splitting it apart at the decimal places, then casting each part to an int. That leads to ValueError: invalid literal for int() with base 10: 'post1' from line 14 of mhkit/wave/contours.py.
To Reproduce:
$ python3 -m venv mhkit_bug
$ source mhkit_bug/bin/activate
$ pip install mhkit matplotlib==3.9.1.post1
$ python3 -c "from mhkit import contours"
Expected behavior:
It should be possible to import MHKiT without raising a ValueError.