While this was already deprecated in 5.4, it happened after the initial gold
release. Thus add it to the 5.4 to 5.5 migration docs.
see WoltLab/WCF#4525
- `wcf\util\StringUtil::startsWith()` ([WoltLab/WCF#4509](https://github.com/WoltLab/WCF/pull/4509))
- `wcf\util\StringUtil::endsWith()` ([WoltLab/WCF#4509](https://github.com/WoltLab/WCF/pull/4509))
- `wcf\util\StringUtil::split()` ([WoltLab/WCF#4513](https://github.com/WoltLab/WCF/pull/4513))
+- `wcf\system\session\Session::getDeviceIcon()` ([WoltLab/WCF#4525](https://github.com/WoltLab/WCF/pull/4525))
#### Properties