insertNode of the javascript library method not working correctly

InsertNode method works ok if the index passed is 0 but not when the index is something else.

Index Check is not working since it don't return false on unspecified index in the list.

if (index > 0 && index > this.size) {
  return false;
} else { ... }

Commit eb3a682780755ef7bb581d664f48d502700fa576

🌳 Branch