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/CoreBundle/Command/ReloadEntryCommand.php

@@ -80,7 +80,7 @@ class ReloadEntryCommand extends ContainerAwareCommand
             $em->persist($entry);
             $em->flush();
 
-            $dispatcher->dispatch(EntrySavedEvent::NAME, new EntrySavedEvent($entry));
+            $dispatcher->dispatch(new EntrySavedEvent($entry), EntrySavedEvent::NAME);
             $progressBar->advance();
 
             $em->detach($entry);