fixup! Fix: Depencency was renamed pytezos-crypto

Author: hoh

src/aleph/chains/tezos.py

@@ -6,7 +6,7 @@
 
 import aiohttp
 from aleph_message.models import Chain
-from aleph_pytezos.crypto.key import Key
+from pytezos_crypto.key import Key
 from configmanager import Config
 from nacl.exceptions import BadSignatureError