fix

composer.json

@@ -8,5 +8,10 @@
             "email": "flyingstarsan.yu@gmail.com"
         }
     ],
-    "require": {}
-}
+    "require": {},
+    "autoload": {
+        "psr-4": {
+            "Channel\\Common\\": "src"
+        }
+    }
+}