Allow floats for Redis timeouts (#4952)

Since Redis 6.0, floats are allowed, see:
https://redis.io/commands/brpop

Author: liZe

third_party/2and3/redis/client.pyi

@@ -374,8 +374,8 @@ class Redis(Generic[_StrType]):
     def watch(self, *names): ...
     def unlink(self, *names: _Key) -> int: ...
     def unwatch(self): ...
-    def blpop(self, keys: Union[_Value, Iterable[_Value]], timeout: int = ...) -> Optional[Tuple[_StrType, _StrType]]: ...
-    def brpop(self, keys: Union[_Value, Iterable[_Value]], timeout: int = ...) -> Optional[Tuple[_StrType, _StrType]]: ...
+    def blpop(self, keys: Union[_Value, Iterable[_Value]], timeout: float = ...) -> Optional[Tuple[_StrType, _StrType]]: ...
+    def brpop(self, keys: Union[_Value, Iterable[_Value]], timeout: float = ...) -> Optional[Tuple[_StrType, _StrType]]: ...
     def brpoplpush(self, src, dst, timeout=...): ...
     def lindex(self, name: _Key, index: int) -> Optional[_StrType]: ...
     def linsert(