Bumps [silex/silex](https://github.com/silexphp/Silex) from 1.2.3 to 2.2.4. - [Release notes](https://github.com/silexphp/Silex/releases) - [Changelog](https://github.com/silexphp/Silex/blob/master/doc/changelog.rst) - [Commits](https://github.com/silexphp/Silex/compare/v1.2.3...v2.2.4) Signed-off-by: dependabot-preview[bot] <support@dependabot.com>