Allow installing stable dependencies.

Author: makasim

composer.json

@@ -7,7 +7,7 @@
     "license": "MIT",
     "require": {
         "php": ">=7.1",
-        "enqueue/enqueue": "0.9.x-dev",
+        "enqueue/enqueue": "^0.9",
         "queue-interop/queue-interop": "^0.7",
         "symfony/console": "^3.4|^4",
         "symfony/process": "^3.4|^4"