添加composer 文件

composer.json

@@ -7,5 +7,12 @@
         }
     ],
     "minimum-stability": "stable",
-    "require": {}
+    "require": {
+        "php": ">=5.3.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "internalApi\\": "src/"
+        }
+    }
 }