Debug tuple print of np.float

[tbaudier]

Debug https://github.com/wolph/numpy-stl/issues/223

With numpy>=2.0.0, tuple(vectors[0]) returns the type of the number (eg: np.float64()) instead of the number.

Adding .tolist() to the vector converts the vector to a python list and could be printed.

Work also with numpy <2.0.0