I additionally updated the namespace of Fluid's AbstractViewHelper.
TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper is deprecated since Typo3 9.5
TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper has been around since Typo 8.x
So if you require Typo3 9.x for this update, it should work.
I additionally updated the namespace of Fluid's AbstractViewHelper.
TYPO3\CMS\Fluid\Core\ViewHelper\AbstractViewHelper
is deprecated since Typo3 9.5TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper
has been around since Typo 8.xSo if you require Typo3 9.x for this update, it should work.