Stop declaring doctrine/orm 3.x compatibility

ORM 3.x support is broken currently

Author: ostrolucky

composer.json

@@ -66,7 +66,7 @@
         }
     },
     "conflict": {
-        "doctrine/orm": "<2.9",
+        "doctrine/orm": "<2.9|>=3.0",
         "twig/twig": "<1.34|>=2.0,<2.4"
     },
     "suggest": {