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* feature:retries: [``botocore``] Add support for retry modes, including ``standard`` and ``adaptive`` modes (`1972 <https://github.com/boto/botocore/issues/1972>`__)
* api-change:``ec2``: [``botocore``] Update ec2 client to latest version
* api-change:``mediatailor``: [``botocore``] Update mediatailor client to latest version
* api-change:``securityhub``: [``botocore``] Update securityhub client to latest version
* api-change:``shield``: [``botocore``] Update shield client to latest version