?UPGRADE FROM 2.3 to 2.4

Form

* The constructor parameter $precision in IntegerToLocalizedStringTransformer is now ignored completely, because a precision does not make sense for integers.

EventDispatcher

* The getDispatcher() and getName() methods from Symfony\Component\EventDispatcher\Event are deprecated, the event dispatcher instance and event name can be received in the listener call instead.

Before:

```php
use Symfony\Component\EventDispatcher\Event;

class Foo
{
    public function myFooListener(Event $event)
    {
        $dispatcher = $event->getDispatcher();
        $eventName = $event->getName();
        $dispatcher->dispatch('log', $event);

        // ... more code
   }
}
```

After:

```php
use Symfony\Component\EventDispatcher\Event;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;

class Foo
{
    public function myFooListener(Event $event, $eventName, EventDispatcherInterface $dispatcher)
    {
        $dispatcher->dispatch('log', $event);

        // ... more code
    }
}
```