docs(restoreAllMocks): available in Jest 21.1.0+ (#4522)

docs/en/JestObjectAPI.md

@@ -181,7 +181,7 @@ Resets the state of all mocks. Equivalent to calling `.mockReset()` on every moc
 Returns the `jest` object for chaining.
 
 ### `jest.restoreAllMocks()`
-##### available in Jest **20.1.0+**
+##### available in Jest **21.1.0+**
 Restores all mocks back to their original value. Equivalent to calling `.mockRestore` on every mocked function. Beware that `jest.restoreAllMocks()` only works when mock was created with `jest.spyOn`; other mocks will require you to manually restore them.
 
 ### `jest.resetModules()`