rfpy_plot fails due to np.float deprecation in numpy

[LevCarlo]

RfPy/rfpy/binning.py

Line 117 in 905e1a9

weight = np.real(abs(weight/np.float(nb)))

Hi Pascal,
np.float was deprecated in NumPy ≥1.20 and this will result in the weight not being calculated correctly when stacking receiver functions into (baz or slow) bins. This should also be one of the reasons why the rfpy_plot doesn't work.

for tr in rf_tmp[0]:
IndexError: list index out of range