pyrserve unsupported on Python 3.13 - requires numpy 2.1.0 or newer

[Paul Nelson]

The final numpy 1.26.0 release only supports Python 3.9-3.12.  Numpy 2.1.0 is the first to support Python 3.13.  Unfortunately the modern need to stay current with security patches, means that even Python 3.11 is no longer a viable version unless you are willing to build Python from source.  The only binary supported Python versions are 3.12, and 3.13 which is why I was testing against 3.13.  I have added this info to issue tracker for numpy >= 2 on GitHub.  But felt a warning was in order if people were thinking of upgrading to Python 3.13.