v15.6.0

• #2086 Update generated code
  • Remove support for pending_invoice_items_behavior on SubscriptionCreateParams
• #2080 Update generated code
  • Add support for update test helper method on resources Treasury.OutboundPayment and Treasury.OutboundTransfer
  • Add support for allow_redisplay on ConfirmationToken.payment_method_preview and PaymentMethod
  • Add support for new values treasury.outbound_payment.tracking_details_updated and treasury.outbound_transfer.tracking_details_updated on enum Event.type
  • Add support for preview_mode on InvoiceCreatePreviewParams, InvoiceUpcomingLinesParams, and InvoiceUpcomingParams
  • Add support for pending_invoice_items_behavior on SubscriptionCreateParams
  • Add support for tracking_details on Treasury.OutboundPayment and Treasury.OutboundTransfer
  • Add support for new values treasury.outbound_payment.tracking_details_updated and treasury.outbound_transfer.tracking_details_updated on enums WebhookEndpointCreateParams.enabled_events[] and WebhookEndpointUpdateParams.enabled_events[]
• #2085 Remove unnecessary pointer to description in deprecation message

See the changelog for more details.