Improvements 🔧

AnalyseApplication: Do not re-analyse stubs on every run (#730), #5826, thanks @dktapps!
Add shorthand for --generate-baseline (-b) (#980), thanks @Seldaek!
Support narrowing down array_filter() return type via string callable (#938), #6417, thanks @herndlm!
Loop optimization (#757), thanks @ging-dev!

Bugfixes 🐛

Fixed level 9 issues (phpstan/phpstan-src@9f12f0f), #6423, #6464, #6236, #6418, #6118, #6081, #6053, #6055, #5860, #6230
Cast PHPDoc array key type with array key casting rules (phpstan/phpstan-src@5d17b84), #6117
Support closure bind with class-string (#706), #4949, thanks @mvorisek!
Fix NeverType::toBoolean() (phpstan/phpstan-src@fe3a341), #6258
Fix DatePeriod constructor extension in subclasses (phpstan/phpstan-src@0c82b3a), #6500
Forget remembered specific type when entering arrow function with same-named parameter (phpstan/phpstan-src@af38f03), #6473
Fix segfault (phpstan/phpstan-src@d101764), #6501

More precise array_chunk signature (#709), thanks @staabm!
Narrow the type for the preg_replace_callback() callable. (#758), thanks @johnbillion!
Update return types for hash functions (#822), thanks @jlherren!
Fix type for array_splice() argument $replacement (#901), #6288, thanks @spawnia!
stream_bucket_new returns an object (#968), thanks @mind-bending-forks!
More precise signatures for mb_* functions (#717), thanks @staabm!
Fix array_column() with null as $column_key (#970), thanks @jlherren!