v0.3.2

[0.3.2] - 2026-09-23

Added

• create_charge accepts an explicit, optional notify_api_version (#14).
  It selects the contract Khipu uses for the charge's notify_url callback.
  A supplied value is sent unchanged as "notify_api_version"; omitting it, or
  passing None, leaves the key out of the request entirely. The SDK does
  not default it to "3.0" or to anything else, and does not restrict the
  value beyond Khipu's own free-string schema. Applications that rely on signed
  JSON notifications should request "3.0" explicitly.

Fixed

• notify_api_version=None passed through **extra_fields used to be sent as
  "notify_api_version": null. As a named parameter, None now means
  omission, like the other optional charge fields.

Notes

• Callers already passing notify_api_version="3.0" through **extra_fields
  keep the same call shape and the same request body. **extra_fields is
  unchanged.
• Retry behaviour (none), success-status handling (201, plus 200 for
  compatibility) and charge correlation fields are unchanged. No generated code
  or OpenAPI document changed.