`reversed` is currently annotated as accepting either a `Sequence` or objects implementing the `__reversed__` protocol.
This however is too strict as, per its [docs](https://docs.python.org/3/library/functions.html#reversed), it can take any object that implements `__len__` and `__getitem__`.
Sequence was unnecessarily specific and prevents numpy type stubs from working with this package. Numpy ndarray isn't compatible with Sequence since it doesn't have __reversed__ method.
