Merge pull request #31 from rebuy-de/conflict-old-jms

Add conflict for too old jms/serializer versions

Author: dbu

composer.json

@@ -30,7 +30,8 @@
         "jms/serializer": "^2.3 || ^3"
     },
     "conflict": {
-        "doctrine/annotations": "< 1.11"
+        "doctrine/annotations": "< 1.11",
+        "jms/serializer": "< 2.3"
     },
     "autoload": {
         "psr-4": {