title: BrowserslistError: Unknown browser query `dead`
body: <p>I ran npm update and it gave me bootstrap v4.1.2.</p>
  
  <p><strong>On start gives the Module build failed: BrowserslistError: Unknown browser query 'dead' error.</strong></p>
  
  <blockquote>
    <p>ERROR in
    ./node_modules/raw-loader!./node_modules/postcss-loader/lib??embedded!./node_modules/bootstrap/dist/css/bootstrap.min.css
    Module build failed: BrowserslistError: Unknown browser query <code>dead</code></p>
  </blockquote>