Bump friendsofphp/php-cs-fixer from 2.15.3 to 2.16.0

Bumps [friendsofphp/php-cs-fixer](https://github.com/FriendsOfPHP/PHP-CS-Fixer) from 2.15.3 to 2.16.0.
- [Release notes](https://github.com/FriendsOfPHP/PHP-CS-Fixer/releases)
- [Changelog](https://github.com/FriendsOfPHP/PHP-CS-Fixer/blob/2.16/CHANGELOG.md)
- [Commits](PHP-CS-Fixer/PHP-CS-Fixer@v2.15.3...v2.16.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>