3.4
This release introduces support for cors_rule.
The relevant documentation can be found below :
https://www.terraform.io/docs/providers/aws/r/s3_bucket.html#using-cors
and
https://github.com/ministryofjustice/cloud-platform-terraform-s3-bucket/blob/b83c140c024e0783a5ca6e1120a3b9384319db4f/example/s3.tf