Add support for batch update, added in the V2 of the API

[damienchambon]

Hello, is it planned to add the batch update of people/events to the Python client? The API V2 allows this, with the batch route, as per the documentation.

This would be very convenient to quickly update many people without exceeding the API limits. Thanks!

[stickandstone]

And the batch deletion, that would be a great feature.