1.6.0
REVERT ENH add the parameter prefit in the FixedThresholdClassifier (#29067) (#30172)
MNT Add author/license note where missing and add the linter (#29477)
ENH remove _xfail_checks, pass directly to check runners, return structured output from check_estimator (#30149)
DOC Improve user guide on scoring parameter (#30316)
ENH add shuffle to GroupKFold (#28519)