Returns whether each `member` is a member of the set stored at `key`.

For every `member`, `1` is returned if the value is a member of the set, or `0`
if the element is not a member of the set or if `key` does not exist.

@return

@array-reply: list representing the membership of the given elements, in the
same order as they are requested.

@examples

```cli
SADD myset "one"
SADD myset "one"
SMISMEMBER myset "one" "notamember"
```