Difference in output for steampipe variable list json output between 0.18 and 0.19

[pskrbasu]

seeing a difference in output for steampipe variable list --output=json between v0.18.x and v0.19.x

mike @ ~/Code/github.com/turbot/steampipe-mod-aws-tags (main) > steampipe variable list --output json
[
  {
    "name": "common_dimensions",
    "type": "list(string)",
    "description": "A list of common dimensions to add to each control.",
    "value_default": "[account_id region]",
    "value": "[account_id region]",
    "mod_name": "aws_tags"
  },
  {
    "name": "mandatory_tags",
    "type": "list(string)",
    "description": "A list of mandatory tags to check for.",
    "value_default": "[Environment Owner]",
    "value": "[Environment Owner]",
    "mod_name": "aws_tags"
  },
  {
    "name": "prohibited_tags",
    "type": "list(string)",
    "description": "A list of prohibited tags to check for.",
    "value_default": "[Password Key]",
    "value": "[Password Key]",
    "mod_name": "aws_tags"
  },
  {
    "name": "tag_dimensions",
    "type": "list(string)",
    "description": "A list of tags to add as dimensions to each control.",
    "value_default": "[]",
    "value": "[]",
    "mod_name": "aws_tags"
  },
  {
    "name": "tag_limit",
    "type": "number",
    "description": "Number of tags allowed on a resource. AWS allows up to 50 tags per resource.",
    "value_default": "45",
    "value": "45",
    "mod_name": "aws_tags"
  }
]
v0.19.x 

mike @ ~/Code/github.com/turbot/steampipe-mod-aws-tags (main) > steampipe variable list --output json
[
{
"name": "common_dimensions",
"type": "list(string)",
"value_default": [
"account_id",
"region"
],
"value": [
"account_id",
"region"
],
"mod_name": "aws_tags"
},
{
"name": "mandatory_tags",
"type": "list(string)",
"value_default": [
"Environment",
"Owner"
],
"value": [
"Environment",
"Owner"
],
"mod_name": "aws_tags"
},
{
"name": "prohibited_tags",
"type": "list(string)",
"value_default": [
"Password",
"Key"
],
"value": [
"Password",
"Key"
],
"mod_name": "aws_tags"
},
{
"name": "tag_dimensions",
"type": "list(string)",
"value_default": null,
"value": null,
"mod_name": "aws_tags"
},
{
"name": "tag_limit",
"type": "number",
"value_default": 45,
"value": 45,
"mod_name": "aws_tags"
}
]
v0.18.x