title: Can I modify a package from node_modules?
body: <p>I use <code>react-redux-snackbar</code> I want to improved the style into this package, I modify the package from <code>node_modules</code> but nothing happens.</p>
  
  <p>When modify <code>node_modules</code> into the folder of this plugin, I would like to mmodify the stylesheet but nothing happens. </p>
  
  <p>Do you have any recommandations, like fork the project and create my own plugin ? </p>