build: 修改 composer 扩展标识

- 将 composer.json 文件中的 "id" 从 "hello" 修改为 "eav"
-此修改用于正确标识 SixShop\eav 扩展

composer.json

@@ -24,7 +24,7 @@
   },
   "extra": {
     "sixshop": {
-      "id": "hello",
+      "id": "eav",
       "class": "SixShop\\eav\\Extension"
     }
   }