composer 更新

dyu/composer.json

@@ -43,6 +43,9 @@
     "think-path": "thinkphp"
   },
   "config": {
-    "preferred-install": "dist"
+    "preferred-install": "dist",
+    "allow-plugins": {
+      "topthink/think-installer": true
+    }
   }
 }