Deprecated: Implicitly marking parameter as nullable is deprecated, the explicit nullable type must be used instead #145
Description
According to the https://wiki.php.net/rfc/deprecate-implicitly-nullable-types RFC and following the https://php.watch/versions/8.4/implicitly-marking-parameter-type-nullable-deprecated we need to fix this deprecation notice.
There are bunch of places where nullable type is declared via "= null" expressions in the code, need to fix them and switch to explicit nullable types.