Support new muilti pop commands (#2051)

* Support new muilti pop commands

* remove .only

* clean code

* fix for 4558ec6a31

* fix tests

Co-authored-by: leibale <leibale1998@gmail.com>

packages/client/lib/commands/ZMPOP.ts

@@ -0,0 +1,34 @@
+import { RedisCommandArgument, RedisCommandArguments } from '.';
+import { SortedSetSide, transformSortedSetMemberReply, transformZMPopArguments, ZMember, ZMPopOptions } from './generic-transformers';
+
+export const FIRST_KEY_INDEX = 2;
+
+export function transformArguments(
+    keys: RedisCommandArgument | Array<RedisCommandArgument>,
+    side: SortedSetSide,
+    options?: ZMPopOptions
+): RedisCommandArguments {
+    return transformZMPopArguments(
+        ['ZMPOP'],
+        keys,
+        side,
+        options
+    );
+}
+
+type ZMPopRawReply = null | [
+    key: string,
+    elements: Array<[RedisCommandArgument, RedisCommandArgument]>
+];
+
+type ZMPopReply = null | {
+    key: string,
+    elements: Array<ZMember>
+};
+
+export function transformReply(reply: ZMPopRawReply): ZMPopReply {
+    return reply === null ? null : {
+        key: reply[0],
+        elements: reply[1].map(transformSortedSetMemberReply)
+    };
+}