Transforming a .tf file into .tf.json returns wrong types

[rami-foo]

Here's a minimal reproduction code to show what i mean

variables.tf

variable "create_main_node_group" {
  description = "Create main node group, main-node-group.tf"
  type        = bool
  default     = true
}

test.py

import json
from pathlib import Path
import hcl2

file_path = Path("./variables_override.tf").resolve()
with open(file_path) as fp:
    json_object = hcl2.load(fp)

file_path = file_path.with_suffix('.tf.json')
with open(file_path, 'w') as fp:
    json.dump(json_object, fp, indent=4)

expected output:

{
    "variable": [
        {
            "create_main_node_group": {
                "description": "Create main node group, main-node-group.tf",
                "type": "bool",
                "default": true
            }
        }]
}

actual output

{
    "variable": [
        {
            "create_main_node_group": {
                "description": "Create main node group, main-node-group.tf",
                "type": "${bool}",
                "default": true
            }
        }]
}

This breaks all terraform commands from working as it doesn't understand the new type:
terraform init

 Error: Invalid type specification

   on variables_override.tf.json line 6, in variable[0].create_main_node_group:
    6:                 "type": "${bool}",

A type specification is either a primitive type keyword (bool, number,
 string) or a complex type constructor call, like list(string).

There is also the issue that the variables is a list and all in all the transformation doesn't seem to work with this library which is a shame but this main issue is still a problem nontheless