* Revert Prevent passing PipelineVariable object into image_uris.retrieve
2.91.0
Not secure
Features
* Support Properties for StepCollection
Bug Fixes and Other Changes
* Prevent passing PipelineVariable object into image_uris.retrieve * support image_uri being property ref for model * ResourceConflictException from AWS Lambda on pipeline upsert
Documentation Changes
2.90.0
Not secure
Features
* Add ModelStep for SageMaker Model Building Pipeline
Bug Fixes and Other Changes
* update setup.py to add minimum python requirement of 3.6
2.89.0
Not secure
Features
* Add PT 1.11 support * add validation specification