v4 branch is incompatible with PHP 8.4

[hubipe]

Hello,
I've just tried to upgrade PHP to 8.4, but the code in the branch v4 which I have been successfully and reliably using on PHP 8.3 does not work with PHP 8.4.

The problem is: Implicitly marking parameter as nullable is deprecated, the explicit nullable type must be used instead.

There are multiple places in the library, which uses typehints with default null value. The typehint in PHP 8.4 needs to be nullable as well.

function test(string $param = NULL)

needs to become

function test(?string $param = NULL)

If you want, I can prepare a fix in a PR - I've done the upgrade myself with Rector...

[hubipe]

Oh, I've just notice, that there already is PR solving this issue #129.
Could you please merge it?

[georged]

@hubipe we're doing regression testing and will merge once it's done. You can always pull the files and merge it locally if it's urgent.