message: fix typecheck:tests type err
diff: @@ -14,7 +14,7 @@ test('mock with 0 calls and default name', () => {
  });
  test('mock with 2 calls, 1 return, 1 throw', () => {
  - const fn = jest.fn(value => {
  + const fn = jest.fn((value: number) => {
  if (value % 2 === 0) {
  return value * 2;
  } else {
  