fix #1956 - add support for LATENCY HISTORY (#2555)

* added support for LATENCY_HISTORY command

* clean code

* Update LATENCY_HISTORY.ts

---------

Co-authored-by: Leibale Eidelman <me@leibale.com>

packages/client/lib/commands/LATENCY_HISTORY.ts

@@ -0,0 +1,27 @@
+export type EventType = (
+    'active-defrag-cycle' |
+    'aof-fsync-always' |
+    'aof-stat' |
+    'aof-rewrite-diff-write' |
+    'aof-rename' |
+    'aof-write' |
+    'aof-write-active-child' |
+    'aof-write-alone' |
+    'aof-write-pending-fsync' |
+    'command' |
+    'expire-cycle' |
+    'eviction-cycle' |
+    'eviction-del' |
+    'fast-command' |
+    'fork' |
+    'rdb-unlink-temp-file'
+);
+
+export function transformArguments(event: EventType) {
+    return ['LATENCY', 'HISTORY', event];
+}
+
+export declare function transformReply(): Array<[
+    timestamp: number,
+    latency: number,
+]>;