Switch to `mock_s3_deprecated` moto decorator as we use boto not boto3
Switch to `mock_s3_deprecated` moto decorator as we use boto not boto3

From the moto v1 release notes
https://github.com/spulec/moto/blob/f80e87aca32b28026b14ec8fba30f532820bd1ce/CHANGELOG.md:

> The normal @mock_<service> decorators will no longer work with boto.
> It is suggested that you upgrade to boto3 or use the standalone-server
> mode. If you would still like to use boto, you must use the
> @mock_<service>_deprecated decorators which will be removed in a
> future release.

Looks like an upgrade to boto3 is in the future!

laterpay/rubberjack-cli