Fix PHP 8.4 incompatibility

[arnested]

The module throws some warnings about "Implicitly marking a parameter as nullable is deprecated since PHP 8.4."

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• examples/*
• modules/next
• packages/next-drupal
• starters/basic-starter
• starters/graphql-starter
• starters/pages-starter
• Other

GitHub Issue: #870

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Describe your changes

Adjusts the method signatures regarding implicit nullable parameters to be compatible with PHP 8.4.

[vercel]

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[boazpoolman]

Thanks for this @arnested.

Just adding a patch here with your changes so that I can apply it in my composer.json.

php-8-4-compatibility.patch