We had to change the old default because of TypeScript complaining if the param has a type annotation and no parens. So it's more consistent with TypeScript now

We had to change the old default because of TypeScript complaining if the param has a type annotation and no parens. So it's more consistent with TypeScript now as well. I had to argue for this exception to be added to our config, so it's a nice bit of validation that Prettier has come around.