Enhancements

• Added columns deregistration_protection, free_tier_eligible, image_allowed, last_launched_time, source_image_id, and source_image_region to aws_ec2_ami and aws_ec2_ami_shared tables. (#2774) (Thanks @StephenKing for the contribution!)
• Added column start_after to aws_s3_object table, which can be used as a query filter to start listing objects after the specified key. (#2772) (Thanks @OsMikeBl for the contribution!)