fix!: update package versions in composer.json
Updated the package versions in composer.json. Changed the version specifications for "quiqqer/core", "quiqqer/frontend-users", "simplito/elliptic-php", and "kornrunner/keccak". This is to ensure compatibility with the latest versions of these packages. Please ensure to run a composer update after this change.
BREAKING CHANGE: quiqqer/core v2