Calendar.js has div wrapper that custom styles cannot be passed to

[Zazzzles]

Hi there, thanks for the lib!

If i understand correctly the calendar will size to fit it's parent on render, I'm not sure how this is possible though since the in Calendar.js we are wrapping the contents of the calendar in a div that can't be styled.

Perhaps giving that container a 100% height and width would help with the scaling? I think this is the reason I am running into issues with the calendar being pretty small and not sizing to fit the parent.

Currently I have to target my custom calendar container and do a > selector to target that specific div in order to size the calendar appropriately.

If this is valid, Im more than happy to create a PR