Bump requirements and fix symfony/event-dispatcher usage

src/Event/BuildDefinitionEvent.php

@@ -15,7 +15,7 @@ namespace Netzmacht\Contao\Leaflet\Event;
 use Contao\Model;
 use Netzmacht\Contao\Leaflet\Mapper\Request;
 use Netzmacht\LeafletPHP\Definition;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Class BuildDefinitionEvent is emitted when the mapper maps between the model and the definition.

src/Event/ConvertToGeoJsonEvent.php

@@ -14,7 +14,7 @@ namespace Netzmacht\Contao\Leaflet\Event;
 
 use Netzmacht\LeafletPHP\Definition;
 use Netzmacht\LeafletPHP\Value\GeoJson\GeoJsonObject;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Class ConvertToGeoJsonEvent is emitted when the DefinitionMapper converts a definition to a geo json feature.

src/Event/GetHashEvent.php

@@ -12,7 +12,7 @@
 
 namespace Netzmacht\Contao\Leaflet\Event;
 
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Class GetHashEvent is emitted then a hash for a data object with an unknown type is required.

src/Event/GetJavascriptEvent.php

@@ -13,7 +13,7 @@
 namespace Netzmacht\Contao\Leaflet\Event;
 
 use Netzmacht\LeafletPHP\Definition\Map;
-use Symfony\Component\EventDispatcher\Event;
+use Symfony\Contracts\EventDispatcher\Event;
 
 /**
  * Class GetJavascriptEvent is emitted after the map javascript was created.

src/MapProvider.php

@@ -27,8 +27,8 @@ use Netzmacht\Contao\Toolkit\View\Template\TemplateReference;
 use Netzmacht\LeafletPHP\Definition\Map;
 use Netzmacht\LeafletPHP\Leaflet;
 use Netzmacht\LeafletPHP\Value\GeoJson\FeatureCollection;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface as EventDispatcher;
 use Symfony\Component\Templating\EngineInterface as TemplateEngine;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface as EventDispatcher;
 
 /**
  * Class MapProvider.
@@ -392,7 +392,7 @@ class MapProvider
         );
 
         $event = new GetJavascriptEvent($definition, $content);
-        $this->eventDispatcher->dispatch($event::NAME, $event);
+        $this->eventDispatcher->dispatch($event, $event::NAME);
 
         return $event->getJavascript();
     }

src/Mapper/DefinitionMapper.php

@@ -20,7 +20,7 @@ use Netzmacht\LeafletPHP\Value\GeoJson\ConvertsToGeoJsonFeature;
 use Netzmacht\LeafletPHP\Value\GeoJson\Feature;
 use Netzmacht\LeafletPHP\Value\GeoJson\FeatureCollection;
 use Netzmacht\LeafletPHP\Value\GeoJson\GeoJsonFeature;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface as EventDispatcher;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface as EventDispatcher;
 
 /**
  * Class DefinitionMapper is the main mapper instance which contains all other mappers as children.
@@ -111,7 +111,7 @@ class DefinitionMapper
 
             if ($definition) {
                 $event = new BuildDefinitionEvent($definition, $model, $request);
-                $this->eventDispatcher->dispatch($event::NAME, $event);
+                $this->eventDispatcher->dispatch($event, $event::NAME);
             }
 
             $this->mapped[$hash] = $definition;
@@ -172,7 +172,7 @@ class DefinitionMapper
         }
 
         $event = new ConvertToGeoJsonEvent($definition, $feature, $model);
-        $this->eventDispatcher->dispatch($event::NAME, $event);
+        $this->eventDispatcher->dispatch($event, $event::NAME);
 
         return $feature;
     }
@@ -190,7 +190,7 @@ class DefinitionMapper
     private function hash($model, $elementId = null)
     {
         $event = new GetHashEvent($model);
-        $this->eventDispatcher->dispatch($event::NAME, $event);
+        $this->eventDispatcher->dispatch($event, $event::NAME);
         $hash = $event->getHash();
 
         if (!$hash) {