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* api-change:``ec2``: Update ec2 client to latest version
* enhancement:AssumeRole: Add support for duration_seconds when assuming a role in the config file (`1600 <https://github.com/boto/botocore/issues/1600>`__).
* api-change:``iam``: Update iam client to latest version
* api-change:``servicecatalog``: Update servicecatalog client to latest version
* api-change:``alexaforbusiness``: Update alexaforbusiness client to latest version