NumbaDeprecationWarning: The 'nopython' keyword argument was not supplied to the 'numba.jit' decorator.

[rmgoetz]

Describe the bug
Importing pyntcloud with numba 0.57.0 (and ostensibly 0.58.0) as well gives the following warning (repeated three times):

NumbaDeprecationWarning: The 'nopython' keyword argument was not supplied to the 'numba.jit' decorator. The implicit default value for this argument is currently False, but it will be changed to True in Numba 0.59.0. See https://numba.readthedocs.io/en/stable/reference/deprecation.html#deprecation-of-object-mode-fall-back-behaviour-when-using-jit for details.

This is because of the three @njit decorators in pyntcloud/utils/numba.py which do not have an explicit nopython argument passed to them.

To Reproduce
Import pyntcloud with numba 0.57.0 installed.

Expected behavior
No deprecation warning

Desktop (please complete the following information):
Both Windows 10 and multiple linux distributions; should be OS agnostic.