Attempt to fix pytraj test.

[drroe]

See e.g. https://github.com/Amber-MD/cpptraj/actions/runs/10635870076/job/29486441993.

Try pinning numpy to 2.0.0 since 2.1.0 seems broken for pytraj.

[drroe]

Yep, numpy 2.1.0 was the problem. Python versioning is a developer's nightmare.

[drroe]

Ugh the appveyor failure is their CI framework:

C:\projects\cpptraj>exit /b 0 
Collecting artifacts...
Found artifact 'cpptraj-50551057.zip' matching 'cpptraj-50551057.zip' path
Uploading artifacts...
[1/1] cpptraj-50551057.zip (20,973,067 bytes)...100%
Error uploading artifact to the storage: Remote server returned 500: Internal Server Error

It may be time to part ways with appveyor.

[hainm]

Python versioning is a developer's nightmare.

I agree completely.
I've filed Amber-MD/pytraj#1667 to resolve that.
I write more Golang recently.