feat: add compatible with php 8

[aldinokemal]

Context:

• Add compatibility with PHP 8 (tested in PHP 8.2)
• Support backward compatibility (both PHP 7 and 8)

Notes:

• I have tested in my locally running PHP 8 and 7.4 together, and there's no issue

[jasny]

Thanks.

Please just update the Cookies class and modify the minimum PHP version in composer.json. I'll do a minor version release (v0.5) afterward. People on PHP7 can continue to use 0.4.

Please also update .scrutinizer.yml, so scrutinize analysis will succeed (probably just need to set the PHP version).

[aldinokemal]

I have updated the PR. when do you plan to upgrade this repository to support PHP 8?
@jasny

[jasny]

Will this change not work with PHP 8.0 and 8.1?

[aldinokemal]

@jasny both can use the old version I believe, should we change become 8.0 as well?

[jasny]

Yes, please set the minimum version to 8.0.