use native promise constructor

example/ios/Flutter/Generated.xcconfig

@@ -0,0 +1,14 @@
+// This is a generated file; do not edit or check into version control.
+FLUTTER_ROOT=D:\flutter
+FLUTTER_APPLICATION_PATH=D:\project\vscode\neko\plugins\flutter_qjs\example
+FLUTTER_TARGET=lib\main.dart
+FLUTTER_BUILD_DIR=build
+SYMROOT=${SOURCE_ROOT}/../build\ios
+OTHER_LDFLAGS=$(inherited) -framework Flutter
+FLUTTER_FRAMEWORK_DIR=D:\flutter\bin\cache\artifacts\engine\ios
+FLUTTER_BUILD_NAME=1.0.0
+FLUTTER_BUILD_NUMBER=1
+DART_OBFUSCATION=false
+TRACK_WIDGET_CREATION=false
+TREE_SHAKE_ICONS=false
+PACKAGE_CONFIG=.packages

example/ios/Flutter/flutter_export_environment.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=D:\flutter"
+export "FLUTTER_APPLICATION_PATH=D:\project\vscode\neko\plugins\flutter_qjs\example"
+export "FLUTTER_TARGET=lib\main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "SYMROOT=${SOURCE_ROOT}/../build\ios"
+export "OTHER_LDFLAGS=$(inherited) -framework Flutter"
+export "FLUTTER_FRAMEWORK_DIR=D:\flutter\bin\cache\artifacts\engine\ios"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
+export "DART_OBFUSCATION=false"
+export "TRACK_WIDGET_CREATION=false"
+export "TREE_SHAKE_ICONS=false"
+export "PACKAGE_CONFIG=.packages"

example/ios/Runner/GeneratedPluginRegistrant.h

@@ -0,0 +1,17 @@
+//
+//  Generated file. Do not edit.
+//
+
+#ifndef GeneratedPluginRegistrant_h
+#define GeneratedPluginRegistrant_h
+
+#import <Flutter/Flutter.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface GeneratedPluginRegistrant : NSObject
++ (void)registerWithRegistry:(NSObject<FlutterPluginRegistry>*)registry;
+@end
+
+NS_ASSUME_NONNULL_END
+#endif /* GeneratedPluginRegistrant_h */

example/ios/Runner/GeneratedPluginRegistrant.m

@@ -0,0 +1,12 @@
+//
+//  Generated file. Do not edit.
+//
+
+#import "GeneratedPluginRegistrant.h"
+
+@implementation GeneratedPluginRegistrant
+
++ (void)registerWithRegistry:(NSObject<FlutterPluginRegistry>*)registry {
+}
+
+@end