Move to PSR-4.

Author: Hywan

composer.json

@@ -29,9 +29,12 @@
     "suggest": {
         "ext-openssl": "To get a better security when exchanging messages."
     },
-    "target-dir": "Hoa/Websocket",
-    "autoload"  : { "psr-0": { "Hoa\\Websocket": "." } },
-    "extra"     : {
+    "autoload": {
+        "psr-4": {
+            "Hoa\\Websocket\\": "."
+        }
+    },
+    "extra": {
         "branch-alias": {
             "dev-master": "2.x-dev"
         }