minor update

Author: gaganmBrowserStack

lib/core/utils/get-ancestry.js

@@ -3,6 +3,7 @@ import getShadowSelector from './get-shadow-selector';
 function generateAncestry(node) {
   const nodeName = node.nodeName.toLowerCase();
   const parentElement = node.parentElement;
+  // eslint-disable-next-line no-unused-vars
   const parentNode = node.parentNode;
 
   let nthChild = '';
@@ -31,7 +32,7 @@ function generateAncestry(node) {
       }
       nthChild = count > 1 ? `:nth-child(${index})` : '';
     } else {
-      index = Array.prototype.indexOf.call(parentNode.children, node) + 1;
+      index = Array.prototype.indexOf.call(parentElement.children, node) + 1;
       nthChild = `:nth-child(${index})`;
     }
   }