Tweaked Symfony Preset

The Symfony core team have changed their code style guide for which functions should be escaped with leading slashes. As such, we’ve deleted our native_constant_invocation_symfony (for BC reasons, we’ve actually made it an alias of our existing native_constant_invocation) fixer. The Symfony preset now contains the native_constant_invocation fixer in place of native_constant_invocation_symfony.

Please let us know if you run into any issues or have any questions.