[Contracts][EventDispatcher] add EventDispatcherInterface to symfony/contracts and use it where possible

Author: nicolas-grekas

Resources/config/services.xml

@@ -49,6 +49,7 @@
             <tag name="container.hot_path" />
         </service>
         <service id="Symfony\Component\EventDispatcher\EventDispatcherInterface" alias="event_dispatcher" />
+        <service id="Symfony\Contracts\EventDispatcher\EventDispatcherInterface" alias="event_dispatcher" />
 
         <service id="http_kernel" class="Symfony\Component\HttpKernel\HttpKernel" public="true">
             <argument type="service" id="event_dispatcher" />

Tests/Functional/Bundle/TestBundle/AutowiringTypes/AutowiredServices.php

@@ -13,7 +13,7 @@
 
 use Doctrine\Common\Annotations\Reader;
 use Psr\Cache\CacheItemPoolInterface;
-use Symfony\Component\EventDispatcher\EventDispatcherInterface;
+use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
 
 class AutowiredServices
 {

composer.json

@@ -20,7 +20,7 @@
         "ext-xml": "*",
         "symfony/cache": "~4.3",
         "symfony/config": "~4.2",
-        "symfony/contracts": "^1.0.2",
+        "symfony/contracts": "^1.1",
         "symfony/dependency-injection": "^4.3",
         "symfony/http-foundation": "^4.3",
         "symfony/http-kernel": "^4.3",