1.2.2
FIX Raise an error when min_samples_split=1 in trees (#25744)
MNT Applies black formatting to most of the code base (#18948)
MAINT Handle `Tree.sample_weight` using a memoryview (#24994)
DOC Ensures that sklearn.tree._export.plot_tree passes numpydoc validation (#24559)
DOC fix broken citeseer links (#24800)
FIX Support read-only sparse datasets for `Tree`-based estimators (#25341)
MNT Use cimport numpy as cnp for sklearn/tree (#23315)
FIX error when deserialzing a Tree instance from a read only buffer (#25585)
MAINT clean-up unused variables and imports in cython files (#24347)