建议采用psr-4的规范避免冲突

composer.json

@@ -18,6 +18,8 @@
         "ext-curl": "*"
 	},
 	"autoload": {
-        "files": ["Meting.php"]
+        "psr-4": {
+			"Meting" : "src/"
+		}
 	}
 }

src/Meting.php

@@ -7,7 +7,7 @@
  * Copyright 2017, METO Sheel <i@i-meto.com>
  * Released under the MIT license
  */
-
+namespace Meting;
 class Meting
 {
     protected $_SITE;