Support React v0.4

Author: clue

composer.json

@@ -12,11 +12,10 @@
     ],
     "require": {
         "php": ">=5.3",
-        "evenement/evenement": "~1.0",
-        "react/promise": "~1.0",
-        "react/socket-client": "0.3.*",
-        "react/event-loop": "0.3.*",
-        "clue/hexdump": "*"
+        "evenement/evenement": "~1.0|~2.0",
+        "react/promise": "~1.0|~2.0",
+        "react/socket-client": "0.3.*|0.4.*",
+        "react/event-loop": "0.3.*|0.4.*"
     },
     "autoload": {
         "psr-4": { "Clue\\React\\Ami\\": "src/" }