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* api-change:``medialive``: Update medialive client to latest version
* enhancement:EndpointDiscovery: Add a config option, ``endpoint_discovery_enabled``, for automatically discovering endpoints
* api-change:``comprehend``: Update comprehend client to latest version
* api-change:``firehose``: Update firehose client to latest version
* api-change:``transcribe``: Update transcribe client to latest version
* api-change:``cognito-idp``: Update cognito-idp client to latest version