fix req.

Author: makasim

composer.json

@@ -12,9 +12,9 @@
     "require-dev": {
         "phpunit/phpunit": "~5.4.0",
         "predis/predis": "^1.1",
-        "enqueue/test": "^0.9@dev",
-        "enqueue/enqueue": "^0.9@dev",
-        "enqueue/null": "^0.9@dev",
+        "enqueue/test": "0.9.x-dev",
+        "enqueue/enqueue": "0.9.x-dev",
+        "enqueue/null": "0.9.x-dev",
         "queue-interop/queue-spec": "^0.5.3@dev",
         "symfony/dependency-injection": "^3.4|^4",
         "symfony/config": "^3.4|^4"