Phone Numbers
Get phone numbers
phone_numbers.list() -> PhoneNumberListResponse { phone_numbers }
GET/phone-numbers
Update a phone number
phone_numbers.update(id, **kwargs) -> PhoneNumberUpdateResponse { phone_number }
PATCH/phone-numbers/{id}
Delete a phone number
phone_numbers.delete(id) -> PhoneNumberDeleteResponse { success }
DELETE/phone-numbers/{id}