PHP 8.4 implicit nullable variables

[BertvanHoekelen]

Describe the bug
In PHP 8.4 implicitly marking parameters null is deprecated. So I get a bunch of deprecation notices.

PHP Deprecated:  Adyen\Config::__construct(): Implicitly marking parameter $params as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Config.php on line 37
PHP Deprecated:  Adyen\Service\Checkout\ModificationsApi::cancelAuthorisedPayment(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/ModificationsApi.php on line 50
PHP Deprecated:  Adyen\Service\Checkout\ModificationsApi::cancelAuthorisedPaymentByPspReference(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/ModificationsApi.php on line 66
PHP Deprecated:  Adyen\Service\Checkout\ModificationsApi::captureAuthorisedPayment(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/ModificationsApi.php on line 82
PHP Deprecated:  Adyen\Service\Checkout\ModificationsApi::refundCapturedPayment(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/ModificationsApi.php on line 98
PHP Deprecated:  Adyen\Service\Checkout\ModificationsApi::refundOrCancelPayment(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/ModificationsApi.php on line 114
PHP Deprecated:  Adyen\Service\Checkout\ModificationsApi::updateAuthorisedAmount(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/ModificationsApi.php on line 130
PHP Deprecated:  Adyen\Service::requestHttp(): Implicitly marking parameter $bodyParams as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service.php on line 55
PHP Deprecated:  Adyen\Service::requestHttp(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service.php on line 55
PHP Deprecated:  Adyen\Service\Checkout\PaymentsApi::cardDetails(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/PaymentsApi.php on line 50
PHP Deprecated:  Adyen\Service\Checkout\PaymentsApi::getResultOfPaymentSession(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/PaymentsApi.php on line 65
PHP Deprecated:  Adyen\Service\Checkout\PaymentsApi::paymentMethods(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/PaymentsApi.php on line 80
PHP Deprecated:  Adyen\Service\Checkout\PaymentsApi::payments(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/PaymentsApi.php on line 95
PHP Deprecated:  Adyen\Service\Checkout\PaymentsApi::paymentsDetails(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/PaymentsApi.php on line 110
PHP Deprecated:  Adyen\Service\Checkout\PaymentsApi::sessions(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/PaymentsApi.php on line 125
PHP Deprecated:  Adyen\Service\Checkout\RecurringApi::deleteTokenForStoredPaymentDetails(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/RecurringApi.php on line 50
PHP Deprecated:  Adyen\Service\Checkout\RecurringApi::getTokensForStoredPaymentDetails(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/RecurringApi.php on line 63
PHP Deprecated:  Adyen\Service\Checkout\RecurringApi::storedPaymentMethods(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Checkout/RecurringApi.php on line 78
PHP Deprecated:  Adyen\Service\Payout\InitializationApi::storeDetail(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Payout/InitializationApi.php on line 50
PHP Deprecated:  Adyen\Service\Payout\InitializationApi::storeDetailAndSubmitThirdParty(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Payout/InitializationApi.php on line 65
PHP Deprecated:  Adyen\Service\Payout\InitializationApi::submitThirdParty(): Implicitly marking parameter $requestOptions as nullable is deprecated, the explicit nullable type must be used instead in /app/vendor/adyen/php-api-library/src/Adyen/Service/Payout/InitializationApi.php on line 80

To Reproduce
Steps to reproduce the behavior:

1. Install library in a new PHP 8.4 environment
2. Do anything with the library

Expected behavior
Don't have any deprecation notices.

Additional context
I could open a PR fixing it except these classes seem auto generated. So before I spent time creating a PR I want to verify with you.

[coajaxial]

Would be great if this could be fixed!