_fisher_sim fact variable computation uses an obsolete numpy dtype

[LouisLalonde]

Line 248

fact = np.zeros(wkslimit + 1, dtype=np.float, order='F')

Should use a valid numpy float type

fact = np.zeros(wkslimit + 1, dtype=np.float32, order='F')

[maclandrol]

@LouisLalonde can you make a PR ?

[maclandrol]

close by #14