Blur_faces numpy issue

[alexarje]

There is a compability issue with the latest version of numpy. Found it when testing the blur_faces() function:

AttributeError: module 'numpy' has no attribute 'bool'. np.bool was a deprecated alias for the builtin bool. To avoid this error in existing code, use bool by itself. Doing this will not modify any behavior and is safe. If you specifically wanted the numpy scalar type, use np.bool_ here. The aliases was originally deprecated in NumPy 1.20; for more details and guidance see the original release note at: https://numpy.org/devdocs/release/1.20.0-notes.html#deprecations

[joachimpoutaraud]

Thank you for reporting this issue! I have updated the _centerface.py script and changed the data type of the numpy array to bool instead of np.bool.