feat: support importHelpers config option

packages/core/tslib/index.ts

@@ -0,0 +1,3 @@
+export * from 'tslib?original';
+import { __extends as tslibExtends } from 'tslib?original';
+export const __extends = global.__extends || tslibExtends;

packages/core/tslib/references.d.ts

@@ -0,0 +1,3 @@
+declare module 'tslib?original' {
+	export * from 'tslib';
+}

packages/webpack5/src/configuration/base.ts

@@ -1,8 +1,9 @@
-import { extname, resolve } from 'path';
+import { extname, resolve, join } from 'path';
 import {
 	ContextExclusionPlugin,
 	DefinePlugin,
 	HotModuleReplacementPlugin,
+	NormalModuleReplacementPlugin,
 } from 'webpack';
 import Config from 'webpack-chain';
 import { existsSync } from 'fs';
@@ -368,6 +369,13 @@ export default function (config: Config, env: IWebpackEnv = _env): Config {
 	// 	}
 	// ])
 
+	config
+		.plugin('NormalModuleReplacementPlugin|tslib')
+		.use(NormalModuleReplacementPlugin, [
+			/^tslib$/,
+			'@nativescript/core/tslib',
+		]);
+
 	config.plugin('PlatformSuffixPlugin').use(PlatformSuffixPlugin, [
 		{
 			platform,