Webpack hangs on building modules

package.json

{
  "name": "landing-page-unopar",
  "version": "0.0.1",
  "description": "Landing Page de Unopar.",
  "private": true,
  "author": "Vitor Cavalcanti",
  "maintainers": [],
  "license": "MIT",
  "keywords": [
    "landing-page",
    "lp",
    "front-end"
  ],
  "main": "./src/script/index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "webpack-dev-server --hot --content-base ./dist --progress",
    "build": "webpack -p --env production --hide-modules --progress"
  },
  "dependencies": {
    "babel-polyfill": "^6.23.0",
    "picturefill": "^3.0.2",
    "rupture": "^0.6.2"
  },
  "devDependencies": {
    "autoprefixer": "^7.0.1",
    "babel-core": "^6.24.1",
    "babel-loader": "^7.0.0",
    "babel-plugin-transform-object-rest-spread": "^6.23.0",
    "babel-preset-es2015": "^6.24.1",
    "css-loader": "^0.28.1",
    "cssnano": "^3.10.0",
    "extract-text-webpack-plugin": "^2.1.0",
    "file-loader": "^0.11.1",
    "html-minifier": "^3.4.4",
    "html-webpack-plugin": "^2.28.0",
    "image-webpack-loader": "^3.3.1",
    "postcss-loader": "^2.0.5",
    "pug": "^2.0.0-rc.1",
    "pug-loader": "^2.3.0",
    "style-loader": "^0.17.0",
    "stylus": "^0.54.5",
    "stylus-loader": "^3.0.1",
    "webpack": "^2.5.1",
    "webpack-dev-server": "^2.4.5"
  }
}

webpack.config.js

const path = require('path')
const { UglifyJsPlugin } = require('webpack').optimize
const HtmlPlugin = require('html-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')

const babel = {
  test: /\.js$/,
  use: 'babel-loader'
}

const pug = {
  test: /\.pug$/,
  use: {
    loader: 'pug-loader',
    options: {
      pretty: true
    }
  }
}

const stylus = {
  test: /\.styl$/,
  use: ExtractTextPlugin.extract({
    fallback: 'style-loader',
    use: [
      {
        loader: 'css-loader',
        options: {
          sourceMap: true,
          minimize: false
        }
      },
      {
        loader: 'postcss-loader',
        options: {
          sourceMap: true
        }
      },
      {
        loader: 'stylus-loader',
        options: {
          sourceMap: true,
          paths: ['node_modules'],
          'resolve url': true,
          'include css': true
        }
      }
    ]
  })
}

const favicon = {
  test: /(apple-touch-icon|favicon)\.(ico|png)$/,
  use: {
    loader: 'file-loader',
    options: {
      name: '[name].[ext]'
    }
  }
}

const image = {
  test: /\.(png|jpe?g)$/,
  exclude: favicon.test,
  use: [
    {
      loader: 'file-loader',
      options: {
        name: 'img/[name].[ext]'
      }
    },
    // 
    // {
    //   loader: 'image-webpack-loader',
    //   options: {}
    // }
  ]
}

const font = {
  test: /\.(eot|ttf|woff2?|svg)$/,
  use: {
    loader: 'file-loader',
    options: {
      name: 'font/[name].[ext]'
    }
  }
}

const config = {
  entry: {
    main: './src/script/index.js',
    vendors: ['babel-polyfill', 'picturefill']
  },
  output: {
    filename: '[name].js',
    path: path.join(__dirname, './dist')
  },
  module: {
    rules: [babel, pug, stylus, favicon, image, font]
  },
  plugins: [
    new HtmlPlugin({
      filename: 'index.html',
      template: 'src/view/index.pug'
    }),
    new ExtractTextPlugin('style.css')
  ],
  devtool: false,
  target: 'web'
}

function getProduction() {
  pug.use.options.pretty = false // No modo de distribuição o Pug compilado e o
  config.plugins = [             // HTML resultante do webpack-html-plugin são
    new HtmlPlugin({             // minificados.
      minify: {
        removeStyleLinkTypeAttributes: true,
        removeScriptTypeAttributes: true,
        removeRedundantAttributes: true,
        removeAttributeQuotes: true,
        removeComments: true
      },
      filename: 'index.html',
      template: 'src/view/index.pug'
    }),
    new ExtractTextPlugin('style.css'),
    new UglifyJsPlugin()
  ]

  return config
}

module.exports = env => (env === 'production') ? getProduction() : config