Official AWS SDK for PHP version 2.8.21 with updates and bugfixes for: AwsEc2, AwsIam, AwsKinesis, AwsMachineLearning, AwsOpsWorks, AwsRoute53, AwsS3, AwsStorageGateway. See: https://github.com/aws/aws-sdk-php/releases/tag/2.8.21