title: css-loader, export css modules mapping
body: <p>When using postcss-loader (with postcss-modules) in webpack, I get a .json file for each .scss file I have with the css-module hash mappings. If I use css-loader with <code>modules: true</code>, I do not get such mapping file. Is it possible to also get one with that loader?</p>
  
  <p>The issue is really that when using postcss-loader, I can for some reason not import scss files in my .js files. If I use css-loader instead, that is possible.</p>
  
  <p>I would need to both import the scss files in my .js files with css-modules correctly imported, and have the mapping files (.json) generated, which I am using in my php files.</p>