Fix EventDispatcer & events

Looks like parameter for the `->dispatch(` have been flipped (event first then event name).
Define events should now extends `Symfony\Contracts\EventDispatcher\Event`

src/Wallabag/ImportBundle/Consumer/AbstractConsumer.php

@@ -72,7 +72,7 @@ abstract class AbstractConsumer
             $this->em->flush();
 
             // entry saved, dispatch event about it!
-            $this->eventDispatcher->dispatch(EntrySavedEvent::NAME, new EntrySavedEvent($entry));
+            $this->eventDispatcher->dispatch(new EntrySavedEvent($entry), EntrySavedEvent::NAME);
 
             // clear only affected entities
             $this->em->clear(Entry::class);