hash val conflict for 3D coordinate

[DeepDuke]

Hi, thanks for this great project. It seems the hash value may conflict for larger numbers as can be seen in the following screenshot

[minaguib]

I ran into this as well with this library in the 2-dimensional space. All of these return the same position:

>>> import pymorton as pm
>>> pm.interleave2(18580409, 175926)
3366932329
>>> pm.interleave2(18645945, 175926)
3366932329
>>> pm.interleave2(18777017, 175926)
3366932329
>>> pm.interleave2(18842553, 175926)
3366932329
>>> pm.interleave2(18908089, 175926)
3366932329