v0.14.0

Added

• Private payments with Hinkal (live on the P2Flux API since 26 October 2026).
  'private_payment' => 'hinkal' on createPayment() and createPaymentLink() (once and reusable, not subscriptions) adds "Pay
  privately with Hinkal" to the hosted checkout; the answer, resolvePayment() and link terms carry
  private_payment. A verification's accounting.refundable is false for a payment made through a
  privacy service (refund it by hand); link payments in the manage view carry refundable and
  screening. Requests and answers were already passed through unchanged, so 0.13.0 code can use it
  too; this release documents it. (https://p2flux.com/docs/payments.html#private)