ts-loader: Cannot find typings with typescript@beta and @type

My problem same as in https://github.com/TypeStrong/ts-loader/issues/243

After installing @types/node i got multiple errors:

(1,21): error TS2307: Cannot find module 'fs'.
(3,23): error TS2307: Cannot find module 'path'.
(80,41): error TS2304: Cannot find name 'process'.
(5,12): error TS2304: Cannot find name 'global'.
(6,5): error TS2304: Cannot find name 'require'.

I add all definitions to types

But as said https://github.com/mhegazy in https://github.com/DefinitelyTyped/DefinitelyTyped/issues/10113#issuecomment-233199963

you should not need to add the types property, the behavior should be the same with or without it

2.0.0-beta compiler.

project: https://github.com/sanex3339/javascript-obfuscator/tree/dev

project tsconfig:

{
  "compilerOptions": {
    "target": "ES6",
    "module": "commonjs",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": true,
    "noImplicitAny": true,
    "strictNullChecks": true,
    "noUnusedLocals": true
  }
}

entry point

"use strict";

import { JavaScriptObfuscator } from './src/JavaScriptObfuscator';

if (!(<any>global)._babelPolyfill) {
    require('babel-polyfill');
}

module.exports = JavaScriptObfuscator;

to reproduce you must clone dev branch, and run node_modules/.bin/webpack --watch