fix(Object): don't copy any property descriptor in utils.inherits (#508)

Author: aisk

src/object.js

@@ -1406,7 +1406,9 @@ module.exports = function(AV) {
       var newArguments = [className].concat(_.toArray(arguments));
       return AV.Object.extend.apply(NewClassObject, newArguments);
     };
-    NewClassObject['new'] = function(attributes, options) {
+    // Add the query property descriptor.
+    Object.defineProperty(NewClassObject, 'query', Object.getOwnPropertyDescriptor(AV.Object, 'query'));
+    NewClassObject['new'] = function (attributes, options) {
       return new NewClassObject(attributes, options);
     };
     AV.Object._classMap[className] = NewClassObject;

src/utils/index.js

@@ -103,14 +103,11 @@ const inherits = function inherits(parent, protoProps, staticProps) {
     child = protoProps.constructor;
   } else {
     /** @ignore */
-    child = function(){ parent.apply(this, arguments); };
+    child = function() { parent.apply(this, arguments); };
   }
 
   // Inherit class (static) properties from parent.
-  for (const prop of Object.getOwnPropertyNames(parent)) {
-    const propertyDescriptor = Object.getOwnPropertyDescriptor(parent, prop);
-    Object.defineProperty(child, prop, propertyDescriptor);
-  }
+  _.extend(child, parent);
 
   // Set the prototype chain to inherit from `parent`, without calling
   // `parent`'s constructor function.