No compatibility with terraform v1.6

[bigwheel]

Describe the Bug

With terraform v1.6, following error occurs in terraform plan:

╷
│ Warning: Deprecated Parameters
│ 
│   on backend.tf line 4, in terraform:
│    4:   backend "s3" {
│ 
│ The following parameters have been deprecated. Replace them as follows:
│   * role_arn -> assume_role.role_arn
│ 
╵

╷
│ Error: Cannot assume IAM Role
│ 
│ IAM Role ARN not set
╵

module

module "terraform_state_backend" {
  source  = "cloudposse/tfstate-backend/aws"
  version = "v1.1.1"

  namespace  = "piyo-dx"
  stage      = "development-tenant"
  name       = "azuread"
  attributes = ["tfstate"]

  terraform_backend_config_file_path = "."
  terraform_backend_config_file_name = "backend.tf"
}

Generated backend.tf

terraform {
  required_version = ">= 1.0.0"

  backend "s3" {
    region         = "ap-northeast-1"
    bucket         = "piyo-dx-development-tenant-azuread-tfstate"
    key            = "terraform.tfstate"
    dynamodb_table = "piyo-dx-development-tenant-azuread-tfstate-lock"
    profile        = ""
    role_arn       = ""
    encrypt        = "true"
  }
}

Expected Behavior

terraform plan success.

Steps to Reproduce

With terraform v1.6 and following configuration:

module "terraform_state_backend" {
  source  = "cloudposse/tfstate-backend/aws"
  version = "v1.1.1"

  namespace  = "hogehoge"
  stage      = "development"
  name       = "fugafuga"
  attributes = ["tfstate"]

  terraform_backend_config_file_path = "."
  terraform_backend_config_file_name = "backend.tf"
}

Screenshots

Environment

• OS: Mac os 14
• terraform version: v1.6.0
• module: v1.1.1

Additional Context

backend syntax was changed from v1.6 ( https://github.com/hashicorp/terraform/releases/tag/v1.6.0 ).
It seems like that role_arn need to be nested.

P.S.

Thank you as always for this module. Our work has become simpler and more beautiful.

[bigwheel]

I has created PR for this issue https://github.com/cloudposse/terraform-aws-tfstate-backend/compare/main...bigwheel:terraform-aws-tfstate-backend:support-terraoform-v16?expand=1 and already tested but I found just Generation of backend configuration file deprecated. I'm stucking.