Add minimum stability - stable support

Author: uro

composer.json

@@ -9,7 +9,7 @@
         "php": "^7.1.3",
         "enqueue/enqueue": "^0.9",
         "ramsey/uuid": "^3",
-        "enqueue/dsn": "0.9.x-dev"
+        "enqueue/dsn": "^0.9"
     },
     "require-dev": {
         "phpunit/phpunit": "~5.4.0",