mypy in vscode complains about the strawberry JSON scalar type/object

• Operating system: os/x m1
• Strawberry version (if applicable): latest + latest mypy

from typing import Optional

import strawberry
from strawberry.scalars import JSON

@strawberry.type
class Mutation:
    @strawberry.mutation
    async def mutateme(
        self,
        configuration: Optional[JSON] = None,
    ) -> str:
        return 'Hello'