* Migration::upsert() returns void
* Unneeded `@property` tags
* Add missing `null` param/return types
* Null types for db\Query + db\ActiveQuery
* Fixed testSelect
* Null types for Validator
* Several more null types
* One more
* Make AccessRule::$allow always a boolean
It doesn't have any special null handling, so it's safe to default to false
* Validator::$skipOnEmpty is always a boolean
* Catch all throwable from Widget::widget()
* Don't limit $previous args to \Exception
The actual \Exception allows $previous to be any throwable in PHP 7+
* Add Throwable catch block to Instance::get()
* Throwable cleanup
Comment changes only.
- Document \Throwable instead of \Exception wherever appropriate
- Removed redundant exception/error classes when \Throwable is referenced
* Yii::setlogger() accepts null
* ArrayHelper::removeValue() can remove any type of value
* Change default $allow value to false
* Fix broken links for events with different namespace
* Fix broken links in see tag
* Fix broken links in see tag (loadData())
* Fix broken link for var_export()
* Fix broken link for CVE
* Remove redundant markdown link wrap in see tags
* Remove see tags that refer to private properties
* Remove more see tags that refer to private properties
* Remove see tags that refer to private methods
* Remove one more redundant markdown link wrap in see tag [skip ci]
* Fix typo in see tag (causes broken link)
* Remove more see tags that refer to private methods
Added catch `\Throwable` to be compatible with PHP7.
Added it in cases where object state needs to be kept consistent.
Mainly on transactions but also some other places where some values are
reset before exiting.
Most of them could probably be refactored by using `finally` in 2.1, as
that requires PHP 5.5.
fixes#12619
