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* enhancement:documentation: Deprecated operations will no longer appear in help documentation or be suggested in autocompletion results.
* feature:Credentials: When creating an assume role profile, you can now specify a credential source outside of the config file using the `credential_source` key.
* feature:Credentials: Adds support for the process credential provider, allowing users to specify a process to call to get credentials.
* feature:Credentials: When creating an assume role profile, you can now specify another assume role profile as the source. This allows for chaining assume role calls.
* api-change:``emr``: Update emr command to latest version
* api-change:``shield``: Update shield command to latest version
* api-change:``xray``: Update xray command to latest version
* api-change:``storagegateway``: Update storagegateway command to latest version
* api-change:``codebuild``: Update codebuild command to latest version
* api-change:``rekognition``: Update rekognition command to latest version
* api-change:``apigateway``: Update apigateway command to latest version
* enhancement:Arguments: Idempotency tokens are no longer marked as a required argument.
* api-change:``cloudformation``: Update cloudformation command to latest version