title: How to set webpackChunkName for import() globally?
body: <p>Since Webpack@3.0.0 we have this great feature which enables named chunk files:</p>
  
  <pre><code>import(
    /* webpackChunkName: "my-chunk-name" */
    /* webpackMode: "lazy-once" */
    'module'
  );
  </code></pre>
  
  <p>However, I'm at the point where I have 40 imports like this and changing each one of them is kind of a hassle.</p>
  
  <p>Is there any way to define <code>webpackChunkName</code> and <code>webpackMode</code> globally for all chunks?</p>
  
  <p>I imagine something like this in <code>webpack.config.js</code>:</p>
  
  <pre><code>output: {
      filename:      'js/[name].js',
      chunkFilename: 'js/[filename].js' // so that import('module') creates module.js
      chunkMode:     'lazy-once' // so I can override default `lazy` option once and for all
  }
  </code></pre>