Variable declarations inside of for loop breaks

[cohenerickson]

When parsing for loops with variable declarations, the type attribute is incorrectly set.

for (const x of y) {

}

AST Output:

{
  "type": "VariableDeclaration",
  "kind": 32,
  "declarations": [
    {
      "type": "VariableDeclarator",
      "id": {
        "type": "Identifier",
        "name": "x"
      },
      "init": null
    }
  ]
}

Expected:

{
  "type": "VariableDeclaration",
  "kind": "const",
  "declarations": [
    {
      "type": "VariableDeclarator",
      "id": {
        "type": "Identifier",
        "name": "x"
      },
      "init": null
    }
  ]
}
```