updated btminer API to use cryptography instead of pycryptodome because it's painful to set up, and updated requirements.txt

API/__init__.py

@@ -56,7 +56,7 @@ class BaseMinerAPI:
         data = None
         try:
             data = await self.send_command(command)
-        except APIError as e:
+        except APIError:
             try:
                 data = {}
                 # S19 handler, try again
@@ -70,8 +70,6 @@ class BaseMinerAPI:
         if data:
             return data
 
-
-
     async def send_command(self, command: str, parameters: str or int or bool = None) -> dict:
         """Send an API command to the miner and return the result."""
         try: