1.6.0
FIX test_csr_polynomial_expansion_index_overflow on [scipy-dev] (#30393)
MNT Add author/license note where missing and add the linter (#29477)
MNT SLEP6 remove args that shouldn't be included in the routing (#29920)
ENH remove _xfail_checks, pass directly to check runners, return structured output from check_estimator (#30149)
ENH Add 'warn' option to 'handle_unknown' parameter in OneHotEncoder (#28637)
API move BaseEstimator._validate_data to utils.validation.validate_data (#29696)
API Revamp estimator tags (#29677)
MNT remove unnecessary cython.import_array (#28656)
BLD Fix more build dependencies in meson build (#28821)