Are there any news on this topic? We would really need the v3 sdk to be able to use IAM Roles for tasks. This requires PHP SDK 3.18.28 or later (https://docs.aws.amazon.com/AmazonECS/latest/developerguide/task-iam-roles.html)
Wouldn’t it be an option to have a hybrid version to fallback to AWS SDK 2 if the PHP version is too old to support AWS SDK 3?