Allow newer version of bunny

Author: enumag

pkg/amqp-bunny/composer.json

@@ -9,7 +9,7 @@
         "php": ">=5.6",
 
         "queue-interop/amqp-interop": "^0.7@dev",
-        "bunny/bunny": "^0.2.4",
+        "bunny/bunny": "^0.2.4|^0.3|^0.4",
         "enqueue/amqp-tools": "^0.8.4@dev"
     },
     "require-dev": {