Set options as empty object if it's undefined in the command constructor
Set options as empty object if it's undefined in the command constructor

alsotang/ioredis,luin/ioredis,thorsteinsson/ioredis,AlphaStaxLLC/ioredis,mtlima/ioredis,fracmak/ioredis,DynamicYield/ioredis,phlip9/ioredis,luin/ioredis,pensierinmusica/ioredis,AVVS/ioredis,DynamicYield/ioredis,albin3/ioredis,suprememoocow/ioredis,ColmHally/ioredis,nswbmw/ioredis,xuyanxiang/ioredis,luin/ioredis,paskakaska/ioredis,dguo/ioredis