Log Message:
py-cryptography[_vectors]: updated to 2.2.1

2.2.1:
Reverted a change to GeneralNames which prohibited having zero elements, due to \ 
breakages.
Fixed a bug in \ 
:func:~cryptography.hazmat.primitives.keywrap.aes_key_unwrap_with_padding that \ 
caused it to raise InvalidUnwrap when key length modulo 8 was zero.