title: Vendor chunk not getting generated in webpack-stats.json when updating the webpack bundle tracker from 0.4.3 to 1.4.0
body: <p>Using webpack5 for a project that uses js and scss for frontent and django for backend. I was getting npm audit warning to update the version of webpack bundle tracker to 1.4.0. I had a vendor chunk that was getting generated in the webpack-stats.json. After updating to newer version, vendor chunk is not getting generated in webpack-stats.json when updating the webpack bundle tracker from 0.4.3 to 1.4.0. Also, updated the djando-webpack-uploader to latest version to check for compatibility issues.
  This gives error while rendering page @: <code>{% render_bundle 'vendor' 'css' %}</code>.
  Do I need to change anything else for updating to newer version of webpack-bundle-tracker?</p>
  <p>I am using splitchunks in config file:</p>
  <pre><code>optimazation : {
  splitchunks : {
  cacheGroups: {
  vendor: {
  test: /[\\/]node_modules[\\/]/,
  name:&quot;vendor&quot;,
  chunks:&quot;all&quot;,
  enforce: true
  }
  }
  }
  }
  </code></pre>