1.5.1
FIX HistGradientBoosting raising ValueError with monotonic_cst and categorical_feature (#28925)
MAINT Clean up deprecations for 1.5: in LinearSV* (#28816)
DOC use pydata-sphinx-theme for the website (#29038)
FIX bagging with metadata routing and estimator implement __len__ (#28734)
MAINT cleanup utils.__init__: move _print_elapsed_time into dedicated submodule (#28662)
DOC Add warm start section for tree ensembles (#29001)
DOC add link to gradient_boosting_regression plot in _gp.py (#29058)
MNT remove unnecessary cython.import_array (#28656)
MAINT cleanup utils.__init__: move chunking tools into dedicated submodule (#28516)
API deprecate multi_class in LogisticRegression (#28703)
DOC Added link to plot_adaboost_regression.py example (#28997)
BLD Add Meson support (#28040)