Attributes aren't responsive for hover Popover effect

[Tyler Wanta]

If you use the default hover trigger for showing the popovers, the attributes won't be responsive.

Steps to reproduce:

• Create Calendar with attributes and with hover trigger for Popover.
• Add a new attribute to a day with an attribute.
• hover over day

You'll see that the day doesn't include the new attribute.

Seems like the custom Popover directive for CalendarDay isn't being called. Not sure why though

[Tyler Wanta]

I managed to fix it by just watching the dayPopover object in CalendarDay.vue and manually remove and re add handlers. I forked the repo and created a new package on npm with a fix. v-calendar-tw if anyone is curious or see the pull request if you just want to copy it yourself 3516646