fix(fmt): improve curried arrow functions

[dsherret]

Input:

const someFunc = (a: string, b: number) => (c: number, d: number, e: number) => (f: string, g: number) => {
};

Before:

const someFunc = (a: string, b: number) =>
  (c: number, d: number, e: number) =>
    (f: string, g: number) => {
    };

After (now):

const someFunc =
  (a: string, b: number) =>
  (c: number, d: number, e: number) =>
  (f: string, g: number) => {
  };