"on click" event example

Hi!

Due to the closed ticket https://github.com/mistic100/jquery-highlighttextarea/issues/42 here a new (open) question:

I do not get to run the "on click" event example. I have tried:

```
...
Lorem ipsum dolor sit amet.

$('textarea').highlightTextarea({
words: ['Lorem ipsum'],
});

if(jQuery().highlightTextarea) {
console.log('Highlight Textarea ready....');
$('.highlightTextarea').on('click', 'mark', function() {
console.log('Highlight Textarea on click');
});
}

...
```

I am grateful for any help ...

..Thanks