fix #1915 - CLIENT TRACKINGINFO (#2127)

* fix #1915 - CLIENT TRACKINGINFO

* remove .only

packages/client/lib/commands/CLIENT_TRACKINGINFO.ts

@@ -0,0 +1,28 @@
+import { RedisCommandArguments } from '.';
+
+export function transformArguments(): RedisCommandArguments {
+    return ['CLIENT', 'TRACKINGINFO'];
+}
+
+type RawReply = [
+    'flags',
+    Array<string>,
+    'redirect',
+    number,
+    'prefixes',
+    Array<string>
+];
+
+interface Reply {
+    flags: Set<string>;
+    redirect: number;
+    prefixes: Array<string>;
+}
+
+export function transformReply(reply: RawReply): Reply {
+    return {
+        flags: new Set(reply[1]),
+        redirect: reply[3],
+        prefixes: reply[5]
+    };
+}