collections.deque doesn't have __reversed__ method

Feature

CPython:

>>> from collections import deque
>>> reversed(deque(range(3))
<_collections._deque_reverse_iterator at 0x7fec6d2fff40>

RustPython:

>>>>> from collections import deque
>>>>> reversed(deque(range(3))
<iter object at 0x5622a0d03340>

reversed(deque) currently falls back to a generic iterator instead of having a specific deque_reverse_iterator type.