Fix PHP 8.4 deprecation

[SerheyDolgushev]

Fixes following PHP 8.4 deprecation for v3:

Deprecated: Opis\Closure\unserialize(): Implicitly marking parameter $options as nullable is deprecated, the explicit nullable type must be used instead in /srv/vendor/opis/closure/functions.php on line 32

[SergiiDolgushev]

@sorinsarca can you please release new v3.6.4 with this fix?

[sorinsarca]

Not yet, some tests are failing.
Will probably pe 3.7.0 and remove support for really old php versions.

[SergiiDolgushev]

@sorinsarca please let me know if you would need any help with 3.7.0.

[sorinsarca]

I think that the simplest way is to change the function signature to:

function unserialize($data, $options = null);

This way I can keep support for older php versions.
To fully support php 8+ code you'll eventually need v4 of opis/closure.

[sorinsarca]

@SergiiDolgushev if you can make a PR for this I'll merge it and release a new version in minutes (it just so happens that I cannot do the PR myself right now, sorry)

[SergiiDolgushev]

Sorry, I've just noticed your lattest comments, and submitted #158. Do you think that will work, or would you prefer function unserialize($data, $options = null); signature?

[sorinsarca]

Nullable types were added in 7.1, so a syntax error is thrown for earlier versions.

[sorinsarca]

So yes, the easiest way is to remove the type

[SergiiDolgushev]

Done: #159

[sorinsarca]

@SergiiDolgushev v3.7.0 was released

[SergiiDolgushev]

@sorinsarca Thank you very much!!!