Not supported in Numpy >= 2.0

**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](https://localhost:8080/#) 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**