Cluster determine slot command name need upper

The judgment of the name is all uppercase, for example:
    L970: if command in ("EVAL", "EVALSHA"):

Author: yangbodong22011

redis/cluster.py

@@ -956,7 +956,7 @@ def determine_slot(self, *args):
             determine what slots to map the command to; or, if the keys don't
             all map to the same key slot.
         """
-        command = args[0]
+        command = args[0].upper()
         if self.command_flags.get(command) == SLOT_ID:
             # The command contains the slot ID
             return args[1]