stix-shifter not usable with Python3.12 because of numpy version dependency

[romain-filigran]

The introduction of "numpy" dependency in version 1.24.4 in latest version (7.1.1) prevent the use of stix-shifter with python 3.12.
Is there a reason to use this specific version of the dependency? Version 1.26.0 seems to be compatible with python3.12 and solves the problem.

[DerekRushton]

I believe the issue was that python 3.8 was limited to using numpy 1.24.4. I had originally planned to set it to the highest version 1.X available, but it broke the test in 3.8 and had to be downgraded to 1.24.4. We just recently updated our test to use python 3.9 and python 3.10 instead of 3.8 and 3.9. I am busy with other work at the moment, but it should be a simple change to upgrade the version.