fix for numpy 2.0

[johannesulf]

I believe the current version of prospector is incompatible with the new numpy>=2.0 releases since numpy.product has been deprecated. The fix is straightforward: replace numpy.product with numpy.prod. I hope this makes sense. There may be other parts of the code that need to be adjusted, as well.

[bd-j]

Thanks! I did a quick grep and didn't notice any other instances of numpy.product.

[johannesulf]

@bd-j There's also a similar issue with numpy.infty. It needs to be replaced with np.inf.

[bd-j]

ah, thanks, thought I'd caught that one but maybe not everywhere.

[bd-j]

I might be able to add a numpy 2.0 spec to the CI grid.

[johannesulf]

Sorry, I was actually playing around with version 1.4. Not sure the issue is still present in main. Sorry for the confusion.

[bd-j]

I think it's fixed on main, except in some parts of the code that are not used and should be removed, but it might be worth a v1.4.1 patch.