Add an event meta / data property to the CalendarEvent interface

[mattlewis92]

This is probably a nicer api than extending the CalendarEvent interface and prevents users accidentally polluting future possible event properties.

[etwillbefine]

I know its a hard breaking-change and maybe even not a better API but wouldn't it be better to make the calendar event (meta property) generic? When I extend the CalendarEvent interface I still have typings but using the new meta attribute makes it harder. So imo, the new API to prevent users accidentally polluting event properties is not worth losing typings?! :/

[mattlewis92]

Ohh good idea, I've not released this yet so it wouldn't be a breaking change

[mattlewis92]

That was easier than I expected 😄 mattlewis92/calendar-utils@7821b04

[etwillbefine]

I did not know something like this is possible mattlewis92/calendar-utils@7821b04#diff-fdb1138e6fb46aad8352fc0cbfb32a0eR49
No BC, you're right :D (thought so because TS compiler will fail for generic classes without typing, but here comes the default awesome!)

[mattlewis92]

I didn't know it was possible, I just tried sticking it in and the compiler didn't complain 😛