title: change edges line color when the connected node clicked in cytoscape.js
body: <p>could someone give an example of Cytoscape.js about a node that when it clicked, the neighbors edges changed its styles.</p>
  <p>this code doesn't work:</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>cy.$('node:selected').neighborhood('edge').style({
    'line-color': 'black'
  });
  cy.$('node:selected').connectedEdges().style({
    'line-color': 'black'
  });</code></pre>
  </div>
  </div>
  </p>