[redis] adds additional sorted set type information (#4278)

Author: vishalkuo

third_party/2and3/redis/client.pyi

@@ -242,14 +242,14 @@ class Redis(object):
         self, name: _Key, mapping: Mapping[_Key, _Str], nx: bool = ..., xx: bool = ..., ch: bool = ..., incr: bool = ...
     ) -> int: ...
     def zcard(self, name): ...
-    def zcount(self, name, min, max): ...
+    def zcount(self, name: _Key, min: _Str, max: _Str) -> int: ...
     def zincrby(self, name, value, amount=...): ...
     def zinterstore(self, dest, keys, aggregate=...): ...
     def zlexcount(self, name, min, max): ...
     def zrange(self, name, start, end, desc=..., withscores=..., score_cast_func=...): ...
     def zrangebylex(self, name, min, max, start=..., num=...): ...
     def zrangebyscore(self, name, min, max, start=..., num=..., withscores=..., score_cast_func=...): ...
-    def zrank(self, name, value): ...
+    def zrank(self, name: _Key, value: _Key) -> Optional[int]: ...
     def zrem(self, name, *values): ...
     def zremrangebylex(self, name, min, max): ...
     def zremrangebyrank(self, name, min, max): ...