Hello there, there are few places where PHP 8.4 throws a warning Implicitly marking parameter ... as nullable is deprecated, ex.

https://github.com/Strobotti/php-jwk/blob/master/src/Key/AbstractKey.php#L168
https://github.com/Strobotti/php-jwk/blob/master/src/Key/Rsa.php#L103

It might be worth to update the CI to check for these warning in other places as well