Support for Redis SCAN command TYPE option

[1riggs]

Redis v6.0 added an argument for the SCAN command called TYPE, Redis docs for said argument are here. Which allows the scan command to filter the returned keys based on the type of the key. While this method certainly has some gotchas it's particularly useful when attempting to fetch all available stream keys from some Redis instance.

I was hoping to be able to do something along the lines of:

const redis = new Redis(port=999, host='localhost')
redis.scan({ type: 'stream' }).then(data => { console.log(data) })
// or
const stream = redis.scanStream({ type: 'stream' })

I apologize in advance if I have simply missed this functionality in ioredis, or is from a Redis version not yet fully supported by ioredis.

[ioredis-robot]

🎉 This issue has been resolved in version 4.22.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀