PHP 8.4: Implicitly nullable parameter declarations deprecated

[antoniovj1]

Hi!

I found a deprecation with PHP 8.4.

https://php.watch/versions/8.4/implicitly-marking-parameter-type-nullable-deprecated

!!  Deprecated: Widmogrod\Functional\map(): Implicitly marking parameter $value as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/vendor/widmogrod/php-functional/src/Functional/functions.php on line 171
!!  PHP Deprecated:  Widmogrod\Functional\map(): Implicitly marking parameter $value as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/vendor/widmogrod/php-functional/src/Functional/functions.php on line 171
!!  PHP Deprecated:  Widmogrod\Functional\bind(): Implicitly marking parameter $value as nullable is deprecated, the explicit nullable type must be used instead in /var/www/html/vendor/widmogrod/php-functional/src/Functional/functions.php on line 191

This apply to multiple functions

[mihaileu]

@widmogrod can you take a look please

[widmogrod]

Working on it #115

[widmogrod]

New tag released 7.0.0

[antoniovj1]

Thank you very much!