Maybe include numpy primitives in __num_types__?

I noticed that[ __num_types__](https://github.com/Cai-Lab-at-University-of-Michigan/nGauge/blob/bae898b3dd1f62cc869ae91a1e54171303869219/ngauge/util.py#L8) only includes float and int, which means I can't initialize a TracingPoint with numpy [data](https://numpy.org/doc/stable/user/basics.types.html).

Just a suggestion