Add two new consts for features with the correct casing
Depracte old const names
Remove marc-mabe/php-enum dependency
Using marc-mabe/php-enum we cannot have two const with the same value.
However we don't use most of the features of this dependency, therefore just using simple consts and an abstract class for a helper functions is just fine.
With the switch to PHP 8.1. we can remove this and switch to native enums.
Add two new consts for features with the correct casing
Depracte old const names
Remove marc-mabe/php-enum dependency Using marc-mabe/php-enum we cannot have two const with the same value. However we don't use most of the features of this dependency, therefore just using simple consts and an abstract class for a helper functions is just fine. With the switch to PHP 8.1. we can remove this and switch to native enums.