client@1.5.7

Fixes

• fix cluster extractFirstKey skip commandOptions() passed to args by @carlhopf in https://github.com/redis/node-redis/pull/2439
• fix #2443 - fix multiple sockets on error in socket initiator by @leibale in https://github.com/redis/node-redis/pull/2480
• fix "falsy" arguments in TS.ALTER by @leibale in https://github.com/redis/node-redis/pull/2483
• fix isolationPool after reconnect by @leibale in https://github.com/redis/node-redis/pull/2409