Fix normalize typing

Florent,

is your proposal compatible with the interface public static function normalize(mixed $value): mixed; ?

I have read https://php.watch/versions/8.0/mixed-type but I am not sure I understand everything

I have tested without changing the interface and it was ok.

https://php.watch/versions/8.0/mixed-type#mixed-variance
https://php.watch/versions/8.0/mixed-type#mixed-covariance

B::baz: Allowed: Narrows down the declared mixed type.

I don't know the current code coverage of the tests but I guess a tests would have failed if this change broke something.

I don't know the current code coverage of the tests but I guess a tests would have failed if this change broke something.

This method is not currently covered by a test, as far as I know

Automatically closed - issue fixed for 2 weeks with no activity.