Adds new plan types for Japan installments

What’s new

Adds bonus and revolving enum values to the type parameter for card installment plans.

This change coincides with the release of installment payments for Stripe Japan accounts, which support other plan types than fixed_count to also choose from:

With a bonus installment plan, the customer defers payment to a later date that aligns with their salary bonus.
With a revolving installment plan, the customer pays a certain amount each month, and the remaining balance rolls over to the next month.

Fields	Change	From → to
Charge.payment_method_details.card.installments.plan.typeConfirmationToken.payment_method_options.card.installments.plan.typeConfirmationToken.testHelpers#create.payment_method_options.card.installments.plan.typeInvoice#create.payment_settings.payment_method_options.card.installments.plan.typeInvoice#update.payment_settings.payment_method_options.card.installments.plan.typePaymentIntent#confirm.payment_method_options.card.installments.plan.typePaymentIntent#create.payment_method_options.card.installments.plan.typePaymentIntent#update.payment_method_options.card.installments.plan.typePaymentIntent.payment_method_options.card.installments.available_plans[].typePaymentIntent.payment_method_options.card.installments.plan.type	Changed	literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving') + 7 more literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')literal('fixed_count') → enum('bonus'\|'fixed_count'\|'revolving')

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