New features
- ([180](https://github.com/filipsnastins/tomodachi-testcontainers/pull/180))
`clients.SNSSQSTestClient`: `SNSSQSTestClient.receive` now returns message attributes.
The returned message is now wrapped in a `SQSMessage` dataclass, containing the `payload` and `message_attributes` fields.
It's a small breaking change for clients that use the `receive` method, because the message's payload is now wrapped in the `payload` attribute.