Next major release changes

[pakrym-stripe]

Changelog

4.0.0 - 2022-08-01

Breaking changes that arose during code generation of the library that we postponed for the next major version. For changes to the SDK, read more detailed description at https://github.com/stripe/stripe-python/wiki/Migration-guide-for-v4. For changes to the Stripe products, read more at https://stripe.com/docs/upgrades#2022-08-01.

"⚠️" symbol highlights breaking changes.

⚠️ Removed

• Removed deprecated AlipayAccount, BitcoinReceiver, BitcoinTransaction, IssuerFraudRecord, Recipient, RecipientTransfer, and ThreeDSecure classes.
• Removed deprecated Charge.update_dispute and Charge.close_dispute methods that were using legacy REST API endpoint. Prefer Dispute.modify and Dispute.close
• Removed deprecated Card.details method and CardDetails resource. The REST API endpoint is not longer supported.
• Removed the deprecated Source.source_transactions method. Prefer SubscriptionItem.list_source_transactions
• Removed the deprecated SubscriptionItem.usage_record_summaries method. Prefer SubscriptionItem.list_usage_record_summaries
• Removed the deprecated Charge.refund method. Prefer Refund.create

⚠️ Changed

• To be consistent with other resource methods, ApplicationFee.refund returns an instance of ApplicationFee and doesn't mutate the instance of ApplicationFee.
• To be consistent with other resource methods, the Customer.delete_discount no longer resets the discount property to None and returns the deleted discount instead. If you were relying on this behavior, reset the discount property manually:
• The LineItem resource now inherits from StripeObject as it has no methods of it's own.
• To be consistent with other resource methods, the Subscription.delete_discount returns an instance of deleted discount and doesn't mutate the instance of Subscription.
• Update the CA certificate bundle.
• Request sending logic unified across standard and custom methods (Unify request sending and result parsing logic #832)

[kamil-stripe]

I think we need to mention chore!: Update CA certifacte bundle (Apr 26). (https://github.com/stripe/stripe-python/pull/829[)](https://github.com/stripe/stripe-python/pull/845/commits/54c98462c1cebeb81b56be2f243c3d6e0427d218) PR too. Right @dcr-stripe ?

[dcr-stripe]

LGTM overall!

Let's add a changelog entry for the request logic unification bit as well - a direct link to the PR is fine. This can help people track changes down in case something broke.