Feature: HTML support

[YWatchman]

No description provided.

[KhairulAzmi21]

How to use method html() ?

[saade]

This will be addressed after #164 as we can use the same implementation

[saade]

#164 got merged, you can now:

public function eventContent(): string
    {
        return <<<JS
            function({ event, timeText, isStart, isEnd, isMirror, isPast, isFuture, isToday, el, view }){
                // Write your custom implementation here
            }
        JS;
    }