distutils removed in Python 3.13

Distutils was [removed from Python 3.13](https://docs.python.org/3/library/distutils.html) after being deprecated from Python 3.10.

This is an issue because:
https://github.com/adobe/himl/blob/eb549219e19e846d120bf4123fb67c545727305f/himl/simplevault.py#L13



