Support VirtualLocation instead of Place

[FabianRahm]

Hi

Thanks for providing this library.

Would it be possible to support the new VirtualLocation feature?

https://developers.google.com/search/docs/data-types/event#virtual-location (Make sure the page is displayed in english).

Or is this already possible via custom code? We're using the 'location' array key and the library automatically creates the '@Place' property.