-`SmithyConnector` and `DynConnector` now return `ConnectorError` instead of `Box<dyn Error>`. If you have written a custom connector, it will need to be updated to return the new error type. (#744)
- The `DispatchError` variant of `SdkError` now contains `ConnectorError` instead of `Box<dyn Error>` (#744).
**Tasks to cut release**
- [ ] Bump MSRV on aws-sdk-rust, then delete this line.