Is your feature request related to a problem? Please describe.
I recently found pendulum and started using it as my default date and datetime management library since the standard python datetime module is not very rich.

Describe the solution you'd like
It would be nice if we could choose either to use the standard datetime module or to use pendulum as our default library to type date/datetime properties.

I'm already using pendulum types in pydantic models I coded manually and so far so good! These types are pendulum.Date and pendulum.DateTime and pendulum.Time.