Merge pull request #125 from Nyholm/patch-4

Support for Symfony 4

Author: ikwattro

composer.json

@@ -26,7 +26,7 @@
       "ext-mbstring": "*",
       "graphaware/neo4j-common": "^3.4",
       "graphaware/neo4j-bolt": "^1.5",
-      "symfony/event-dispatcher": "^2.7 || ^3.0",
+      "symfony/event-dispatcher": "^2.7 || ^3.0 || ^4.0",
       "myclabs/php-enum": "^1.4",
       "php-http/httplug": "^1.0",
       "php-http/message-factory": "^1.0",