Refund Breakdown on Transaction Details

The GET /charges/{chargeId} response now includes a refunds array with a breakdown of each individual refund issued against the charge (id, amount, amount_currency, billing_amount, billing_amount_currency). We've also added settlement_fee, settlement_vat, payment_link_id, payment_link_url, external_id, max_refund_amount, and card expiry (card_expiry_month, card_expiry_year) and card_id fields to the response.