Fix Python 3.12 compatibility by updating fickling requirement

[dguido]

Summary

This PR fixes Python 3.12 compatibility by updating the minimum required version of the fickling dependency.

Problem

Python 3.12 removed the distutils module from the standard library, which caused graphtage to fail with the following error when importing fickling:

ModuleNotFoundError: No module named 'distutils'

Solution

The fickling library already fixed this issue in version 0.1.3 by replacing distutils with the stdlib-list package (see trailofbits/fickling#103). This PR updates the minimum fickling version requirement from >=0.0.8 to >=0.1.3.

Changes

• Updated setup.py to require fickling>=0.1.3 instead of fickling>=0.0.8

Testing

• Verified that fickling 0.1.3+ can be imported without distutils errors
• The fix is minimal and only changes the version constraint for the problematic dependency

Closes #91