chore: add eol

Author: froggy1014

maximum-depth-of-binary-tree/froggy1014.js

@@ -15,9 +15,9 @@
  */
 var maxDepth = function (root) {
   if (!root) return 0;
-  
+
   return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
 };
 
 console.log(maxDepth([3, 9, 20, null, null, 15, 7]));
-console.log(maxDepth([1, null, 2]));
+console.log(maxDepth([1, null, 2]));