fix: only merge basic objects

Author: feildmaster

src/utils/merge.js

@@ -6,7 +6,7 @@ export default function merge(...obj) {
     obj.forEach((o) => {
       each(o, (val, key) => {
         // TODO: How to handle arrays?
-        ret[key] = typeof val === 'object' && !Array.isArray(val) ? merge(ret[key], val) : val;
+        ret[key] = Object.getPrototypeOf(val) === Object.prototype ? merge(ret[key], val) : val;
       });
     });
   }