fix #1959 - LCS (#2129)

* fix #1959 - LCS

* newlines at end of files

packages/client/lib/commands/LCS.ts

@@ -0,0 +1,18 @@
+import { RedisCommandArgument, RedisCommandArguments } from '.';
+
+export const FIRST_KEY_INDEX = 1;
+
+export const IS_READ_ONLY = true;
+
+export function transformArguments(
+    key1: RedisCommandArgument,
+    key2: RedisCommandArgument
+): RedisCommandArguments {
+    return [
+        'LCS',
+        key1,
+        key2
+    ];
+}
+
+export declare function transformReply(): string | Buffer;