[Bug Report] webpack升级到4，vux-loader出错

[success-cg]

vux-loader version

1.2.8

OS/Browsers version

macos 10.13.4 / Chrome 65.0.3325.181

Vue version

2.5.4

Code

// package.json
{
  "name": "vue-webpack4",
  "version": "1.0.0",
  "description": "A Vue.js project",
  "author": "chengong <chengong@qudian.com>",
  "private": true,
  "scripts": {
    "dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
    "start": "npm run dev",
    "build": "node build/build.js"
  },
  "dependencies": {
    "vue": "^2.5.2",
    "vue-router": "^3.0.1",
    "vux": "^2.9.0"
  },
  "devDependencies": {
    "autoprefixer": "^7.1.2",
    "babel-core": "^6.22.1",
    "babel-helper-vue-jsx-merge-props": "^2.0.3",
    "babel-loader": "^7.1.1",
    "babel-plugin-syntax-jsx": "^6.18.0",
    "babel-plugin-transform-runtime": "^6.22.0",
    "babel-plugin-transform-vue-jsx": "^3.5.0",
    "babel-preset-env": "^1.3.2",
    "babel-preset-stage-2": "^6.22.0",
    "chalk": "^2.0.1",
    "copy-webpack-plugin": "^4.0.1",
    "css-loader": "^0.28.0",
    "extract-text-webpack-plugin": "^3.0.0",
    "file-loader": "^1.1.4",
    "friendly-errors-webpack-plugin": "^1.6.1",
    "html-webpack-plugin": "^3.2.0",
    "node-notifier": "^5.1.2",
    "optimize-css-assets-webpack-plugin": "^3.2.0",
    "ora": "^1.2.0",
    "portfinder": "^1.0.13",
    "postcss-import": "^11.0.0",
    "postcss-loader": "^2.0.8",
    "postcss-url": "^7.2.1",
    "rimraf": "^2.6.0",
    "semver": "^5.3.0",
    "shelljs": "^0.7.6",
    "uglifyjs-webpack-plugin": "^1.1.1",
    "url-loader": "^0.5.8",
    "vue-loader": "^15.0.9",
    "vue-style-loader": "^3.0.1",
    "vue-template-compiler": "^2.5.2",
    "vux-loader": "^1.2.10-beta.1",
    "webpack": "^4.8.1",
    "webpack-bundle-analyzer": "^2.9.0",
    "webpack-cli": "^2.1.3",
    "webpack-dev-server": "^3.1.4",
    "webpack-merge": "^4.1.0"
  },
  "engines": {
    "node": ">= 6.0.0",
    "npm": ">= 3.0.0"
  },
  "browserslist": [
    "> 1%",
    "last 2 versions",
    "not ie <= 8"
  ]
}

Steps to reproduce

install 上面的 package.json ，安装 vux

module.exports = vuxLoader.merge(webpackBaseConfig, {
plugins: [{name: 'vux-ui'}]
})

运行出错，如果不安装 vux，仅仅运行 vue 项目是成功的，vux-loader 不支持 webpack4

What is Expected?

webpack4 成功运行 vux

What is actually happening?

报错
error An unexpected error occurred: "Command failed.
Exit code: 1
Command: sh
Arguments: -c webpack-dev-server --inline --progress --config build/webpack.dev.conf.js
Directory: /Users/qudian/vue-test/vue-webpack4
Output:
".