please fix Powermailvalidator

[emgenbroich]

Hi,

could you please delete "mixed" from line 39 in the PowermailValidator?
Our typo3 is showing an error that isValid is not compatible with the powermail evuivalent.

[tobiasschaeferptb]

Hello,

we have the same error with version 0.1.4 on TYPO3 11.5.38. The error message from the apache log is:
PHP Fatal error: Declaration of StudioMitte\\FriendlyCaptcha\\FieldValidator\\PowermailValidator::isValid(StudioMitte\\FriendlyCaptcha\\FieldValidator\\mixed $mail): void must be compatible with In2code\\Powermail\\Domain\\Validator\\AbstractValidator::isValid($mail) in /typo3conf/ext/friendlycaptcha_official/Classes/FieldValidator/PowermailValidator.php on line 39

Best regards,
Tobias Schäfer