message: Update MockFunctionAPI doc to be consistent like other API docs
diff: @@ -245,6 +245,8 @@ console.log(myMockFn(), myMockFn(), myMockFn(), myMockFn());
  ### `mockFn.mockResolvedValue(value)`
  +##### available in Jest **22.2.0+**
  +
  Simple sugar function for:
  ```js
  @@ -263,6 +265,8 @@ test('async test', async () => {
  ### `mockFn.mockResolvedValueOnce(value)`
  +##### available in Jest **22.2.0+**
  +
  Simple sugar function for:
  ```js
  @@ -288,6 +292,8 @@ test('async test', async () => {
  ### `mockFn.mockRejectedValue(value)`
  +##### available in Jest **22.2.0+**
  +
  Simple sugar function for:
  ```js
  @@ -306,6 +312,8 @@ test('async test', async () => {
  ### `mockFn.mockRejectedValueOnce(value)`
  +##### available in Jest **22.2.0+**
  +
  Simple sugar function for:
  ```js
  