Require binsoul/net-mqtt version 0.3

Author: binsoul

composer.json

@@ -18,7 +18,7 @@
     ],
     "require": {
         "php": "~5.6|~7.0",
-        "binsoul/net-mqtt": "~0.2",
+        "binsoul/net-mqtt": "~0.3",
         "react/promise": "~2.0",
         "react/socket": "~0.8"
     },