there is no reliable way to determine the cubrid PDO extension version used
and also no reliable way to detect which combination of server and client produces wrong behavior.

By requiering 9.3 or higher in both client and server we can be sure it works.

fixes #852

API is not finished.

issue #5082

Fixes #5435: Added extra checks to `yii\rbac\DbManager` to prevent database exceptions when `$userId` is empty

Fixed `yii\console\controllers\AssetController` breaks CSS URLs in case target file localed at `yii\web\AssetManager::basePath` root

this commit breaks the apidoc extension. will adjust it afterwards.

Fixes #5467: Added ability to pass HTML tag options to `asEmail()`, `asImage()` and `asUrl()` methods of `yii\i18n\Formatter`

close #5454

close #5455

see http://derickrethans.nl/immutable-datetime.html
by @derickr

fixes #5379

Fixes #5316: Added `startsWith()` and `endsWith()` to `yii\helpers\StringHelper`. Methods are binary-safe, multibyte-safe and optionally case-insensitive

close #5348

fixes #5342

fixes #5179