Add Carbon 3.0 support (or drop dependency altogether)

[jnoordsij]

Carbon 3.0 will be released soon, possibly depending on the Laravel 11 release date (see laravel/framework#49764 (comment)). The master branch of Laravel has already been updated to allow for it; see laravel/framework#49764. The dev-master version of the Laravel skeleton, however, does not allow installation of v3.0 yet, as it clashes with the requirement listed in this package.

A possible solution to resolve this is by allowing ; however, on further inspection, I noticed the requirement was added in #15, but there seems to be no code using it whatsoever. Therefore I assume dropping it altogether is a better alternative.

[freekmurze]

Fixed by #23