Add ability to get return_array contributor values from fields

[donnysim]

For example a class has

class Test {
    protected $columns = ['title', 'updated_at'];
}

maybe could be something like Test:$columns.

[Haehnchen]

field support needed for https://github.com/Haehnchen/idea-php-annotation-plugin/issues/49 so winwin

copy references provides this results. first onw works, but second "constant" will break method handling. so first one is to be valid

\Symfony\Component\Routing\Annotation\Route::$condition
\Symfony\Component\Routing\Annotation\Route::FOO
--
\Symfony\Component\Routing\Annotation\Route:$condition