v527

• Add support for new resource PaymentMethodConfiguration
• Add support for create, list, retrieve, and update methods on resource PaymentMethodConfiguration
• Add support for payment_method_configuration on Checkout.Session#create, PaymentIntent#create, PaymentIntent#update, SetupIntent#create, and SetupIntent#update
• Add support for payment_method_configuration_details on Checkout.Session, PaymentIntent, and SetupIntent