- Bug #13670: Fixed alias option from console when it includes `-` or `_` in option name (pana1990)
- Enh: Added `yii\di\Instance::__set_state()` method to restore object after serialization using `var_export()` function (silvefire)
- Enh #13695:`\yii\web\Response::setStatusCode()` method now returns the Response object itself (kyle-mccarthy)
- Bug #13728: Fixed the bug when `yii\behaviors\SluggableBehavior` wasn't preserving immutable slug values (Kolyunya)
- Bug #13707: Fixed `\yii\web\ErrorHandler` and `\yii\web\ErrorAction` not setting correct response code to response object before rendering error view (samdark)
- Enh #13698:`yii\grid\DataColumn` filter is automatically generated as dropdown list in case of `format` set to `boolean` (bizley)
- Enh #13254: Core validators no longer require Yii::$app to be set (sammousa)