* add: number_of_neighbors feature * add: eigenvalues and eigenvectors features
0.5.1
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* fix: computing features when kdtree is not built from the same points for which we want to compute the features * drop python 3.6, add wheels for python 3.7-3.11 on linux and windows
0.5.0
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* fix: compatibility with latest laspy version (>= 2.1.1, (2.1.0 has a bug))
0.4.3
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* the default value when features can't be computed should be NaN