PHP 8.4 support

[defunctl]

Hello,

I'm seeing some deprecation notices when using this library with PHP 8.4:

Deprecation Notice: Josantonius\Json\Json::set(): Implicitly marking parameter $dot as nullable is deprecated, the explicit nullable type must be used instead in vendor/josantonius/json/src/Json.php:84
Deprecation Notice: Josantonius\Json\Json::merge(): Implicitly marking parameter $dot as nullable is deprecated, the explicit nullable type must be used instead in vendor/josantonius/json/src/Json.php:109
Deprecation Notice: Josantonius\Json\Json::pop(): Implicitly marking parameter $dot as nullable is deprecated, the explicit nullable type must be used instead in vendor/josantonius/json/src/Json.php:135
Deprecation Notice: Josantonius\Json\Json::push(): Implicitly marking parameter $dot as nullable is deprecated, the explicit nullable type must be used instead in vendor/josantonius/json/src/Json.php:164
Deprecation Notice: Josantonius\Json\Json::shift(): Implicitly marking parameter $dot as nullable is deprecated, the explicit nullable type must be used instead in vendor/josantonius/json/src/Json.php:191
Deprecation Notice: Josantonius\Json\Json::unshift(): Implicitly marking parameter $dot as nullable is deprecated, the explicit nullable type must be used instead in vendor/josantonius/json/src/Json.php:242

[josantonius]

Hi, currently it only supports PHP 8.1 and 8.2. I don’t have plans to update it for newer versions, and in fact, it’s more likely that I’ll archive it.