Bump symfony event-dispatcher version

Author: sebastianfeldmann

composer.json

@@ -43,7 +43,7 @@
     "sebastian/environment": "~1.1|~2.0|~3.0",
     "sebastianfeldmann/cli": "~2.2",
     "phpmailer/phpmailer": "~6.0",
-    "symfony/event-dispatcher": "~2.6|~3.0|~4.2.0"
+    "symfony/event-dispatcher": "~2.6|~3.0|~4.2"
   },
   "require-dev": {
     "sebastianfeldmann/git": "~1.0",