fully drain pending finalizers and support nested napi_ref deletion

Author: mertcanaltin

test/js-native-api/6_object_wrap/6_object_wrap.cc

@@ -11,9 +11,7 @@ MyObject::MyObject(double value)
     : value_(value), env_(nullptr), wrapper_(nullptr), nested_(nullptr) {}
 
 MyObject::~MyObject() {
-  if (nested_ != nullptr) {
-    napi_delete_reference(env_, nested_);
-  }
+  napi_delete_reference(env_, nested_);
   napi_delete_reference(env_, wrapper_);
 }
 
@@ -79,6 +77,8 @@ napi_value MyObject::New(napi_env env, napi_callback_info info) {
         napi_wrap(env, _this, obj, MyObject::Destructor,
             nullptr /* finalize_hint */, &obj->wrapper_));
 
+    NODE_API_CALL(env, napi_create_reference(env, _this, 1, &obj->nested_));
+
     return _this;
   }