Relax dependencies

Fixes #21

Author: simonhamp

composer.json

@@ -9,8 +9,8 @@
         "ext-zmq": "*",
         "cboden/ratchet": "^0.4",
         "graham-campbell/throttle": "^6.0",
-        "illuminate/console": "5.5.*",
-        "illuminate/support": "5.5.*",
+        "illuminate/console": "^5.5",
+        "illuminate/support": "^5.5",
         "react/zmq": "0.2.*|0.3.*"
     },
     "autoload": {