Update generated code for beta

[stripe-openapi[bot]]

Codegen for openapi v879.

Changelog

• Add support for new resources Billing.MeterEventAdjustment, Billing.MeterEvent, and Billing.Meter
• Add support for create, deactivate, list, reactivate, retrieve, and update methods on resource Meter
• Add support for create method on resources MeterEventAdjustment and MeterEvent
• Add support for create test helper method on resource ConfirmationToken
• Add support for add_lines, remove_lines, and update_lines methods on resource Invoice
• Add support for multibanco payment method throughout the API.
• Add support for second_line on Issuing.PhysicalBundle.features
• Add support for multibanco_display_details on PaymentIntent.next_action
• Add support for meter on PlanCreateParams, Plan, Price.recurring, PriceCreateParams.recurring, and PriceListParams.recurring