title: Force recache JSON files in webpack's require
body: <p>I'm using <a href="https://github.com/alexkuz/redux-pagan" rel="nofollow noreferrer">redux-pagan</a> plugin for localization. All locales are stored in JSON files and load on demand by this function (from redux-pagan docs), which uses promise-loader.</p>
  
  <pre><code>function getLangData(locale) {
    // here we use promise-loader to load lang data by demand
    return require('promise?global,[name].i18n!json!./i18n/' + locale + '.i18n.json');
  }
  </code></pre>
  
  <p>At some point my locale files may be updated or changed so I want to trigger force-recache to clients browsers reload files.<br>
  I was thinking about using that old ?v=2 trick but it didn't work. Also I've tried [hash] which didn't help too.</p>
  
  <p>That webpack's require syntax is total mess!<br>
  How to trigger force recache of JSON files?</p>