Double check the project function

[qzhu2017]

Needs to double check if this function works properly.

https://pyxtal.readthedocs.io/en/latest/_modules/pyxtal/symmetry.html#Wyckoff_position.project

>>> from pyxtal.symmetry import Group
>>> wp = Group(213)[2]
>>> wp.get_label()
'8c'
>>> wp.project([0.15, 0.15, 0.15])
array([0.81666667, 0.81666667, 0.81666667])
>>> wp.project([0.25, 0.25, 0.25])
array([0.91666667, 0.91666667, 0.91666667])