Stripe

* [818](https://github.com/stripe/stripe-python/pull/818) fix: Update cash balance methods to no longer require nested ID.

* [812](https://github.com/stripe/stripe-python/pull/812) API Updates
* Add support for new resource `Apps.Secret`

* [810](https://github.com/stripe/stripe-python/pull/810) API Updates
* Add support for new resources `Treasury.CreditReversal`, `Treasury.DebitReversal`, `Treasury.FinancialAccountFeatures`, `Treasury.FinancialAccount`, `Treasury.FlowDetails`, `Treasury.InboundTransfer`, `Treasury.OutboundPayment`, `Treasury.OutboundTransfer`, `Treasury.ReceivedCredit`, `Treasury.ReceivedDebit`, `Treasury.TransactionEntry`, and `Treasury.Transaction`
* Add support for `retrieve_payment_method` method on resource `Customer`
* Add support for `list_owners` and `list` methods on resource `FinancialConnections.Account`
* [719](https://github.com/stripe/stripe-python/pull/719) Set daemon attribute instead of using setDaemon method that was deprecated in Python 3.10
* [767](https://github.com/stripe/stripe-python/pull/767) Bump vendored six to 1.16.0
* [806](https://github.com/stripe/stripe-python/pull/806) Start testing on pypy-3.8
* [811](https://github.com/stripe/stripe-python/pull/811) Add sanitize_id method

* [809](https://github.com/stripe/stripe-python/pull/809) Release of major version v3.0.0. The [migration guide](https://github.com/stripe/stripe-python/wiki/Migration-Guide-for-v3) contains more information.
(⚠️ = breaking changes):
* ⚠️ Replace the legacy `Order` API with the new `Order` API.
* New methods: `cancel`, `list_line_items`, `reopen`, and `submit`
* Removed methods: `pay` and `return_order`
* Removed resources: `OrderItem` and `OrderReturn`
* ⚠️ Rename `financial_connections.account.refresh` to `financial_connections.refresh_account`
* Add support for `amount_discount`, `amount_tax`, and `product` on `LineItem`

* [808](https://github.com/stripe/stripe-python/pull/808) API Updates
* Add support for new resources `FinancialConnections.AccountOwner`, `FinancialConnections.AccountOwnership`, `FinancialConnections.Account`, and `FinancialConnections.Session`

* [805](https://github.com/stripe/stripe-python/pull/805) API Updates
* Add support for new resource `CashBalance`