Not supported in Numpy >= 2.0

[muhalfian]

Describe the bug
I cannot run .plot() using numpy >= 2.0. If I downgrade numpy, it will change all of my codes. Please help me.

To Reproduce
Steps to reproduce the behavior:

1. When I plot my obj
   obj.plot()

2. Show this error
   /usr/local/lib/python3.11/dist-packages/pyntcloud/plot/matplotlib_backend.py in plot_with_matplotlib(cloud, **kwargs)
   23 colors = get_colors(cloud, kwargs["use_as_color"], kwargs["cmap"])
   24
   ---> 25
   26 ptp = np.ptp(cloud.xyz)
   27

AttributeError: ptp was removed from the ndarray class in NumPy 2.0. Use np.ptp(arr, ...) instead.

Expected behavior
I want to show my object

Screenshots

[SjoerdAlliander]

This also happens when you run the add_structure("voxel_grid") method.