title: webpack error configuration.module has an unknown property 'loaders'
body: <p>When I run the server using <code>npm run start</code>, I am getting following error:</p>
  
  <pre><code>✖ ｢wds｣: Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
  
   - configuration has an unknown property 'debug'. These properties are valid:
  
     object { amd?, bail?, cache?, context?, dependencies?, devServer?, devtool?, entry?, externals?, infrastructureLogging?, loader?, mode?, module?, name?, node?, optimization?, output?, parallelism?, performance?, plugins?, profile?, recordsInputPath?, recordsOutputPath?, recordsPath?, resolve?, resolveLoader?, serve?, stats?, target?, watch?, watchOptions? }
  
     The 'debug' property was removed in webpack 2.0.0.
  
     Loaders should be updated to allow passing this option via loader options in module.rules.
  
     Until loaders are updated one can use the LoaderOptionsPlugin to switch loaders into debug mode:
     plugins: [
       new webpack.LoaderOptionsPlugin({
         debug: true
       })
     ]
   - configuration.module has an unknown property 'loaders'. These properties are valid:
  
     object { defaultRules?, exprContextCritical?, exprContextRecursive?, exprContextRegExp?, exprContextRequest?, noParse?, rules?, strictExportPresence?, strictThisContextOnImports?, unknownContextCritical?, unknownContextRecursive?, unknownContextRegExp?, unknownContextRequest?, unsafeCache?, wrappedContextCritical?, wrappedContextRecursive?, wrappedContextRegExp? }
  
     -&gt; Options affecting the normal modules (`NormalModuleFactory`).
  </code></pre>
  
  <p>My webpack.config.js is as following:</p>
  
  <pre><code>const path = require('path');
  const webpack = require('webpack');
  
  module.exports = {
    entry: [
      './src/Main.js'
    ],
    output: { path: __dirname, filename: 'bundle.js' },
    cache: true,
    debug: true,
    devtool: 'source-map',
    module: {
      loaders: [
        {
          test: /\.glsl$/,
          loader: 'webpack-glsl',
          include: [
            path.resolve(__dirname, 'src', 'shaders')
          ]
        }
      ]
    },
    devServer: {
      compress: true,
      disableHostCheck: true,
    },
    plugins: [
      new webpack.LoaderOptionsPlugin({
        debug: true
      })
    ]
  };
  </code></pre>