1.2.0
FIX Improves nan support in LabelEncoder (#22629)
MNT Applies black formatting to most of the code base (#18948)
MNT Use cimport numpy as cnp for sklearn/preprocessing (#23349)
DOC fix a missing final fullstop in docstring (#24739)
API Rename OneHotEncoder option sparse to sparse_output (#24412)
MAINT test globally setting output via context manager (#24932)
DOC Improve docstring around set_output (#24672)
MAINT Clean deprecation for 1.2: get_feature_names (#24395)