Add support for Hyperloglog

[arpitbbhayani]

No description provided.

[Vsareen0]

Hey @arpitbbhayani , I would like to take this up.

Resources: 

- https://redis.io/docs/latest/develop/data-types/probabilistic/hyperloglogs/
- http://antirez.com/news/75

Commands to add: https://redis.io/docs/latest/commands/?group=hyperloglog

Subsequently, opened small PR for picking this up easily.

1. Add support for PFADD command #238
2. Add support for PFCOUNT command #239
3. Add support for PFDEBUG command #240
4. Add support for PFMERGE command #241
5. Add support for PFSELFTEST command #242

[arpitbbhayani]

@Vsareen0 Go for it. Assigned.

[Vsareen0]

Still Working on this task, solidifying my understanding a bit more how redis uses it, before writing garbish want to make sure I know what I am writing.

[AshwinKul28]

@Vsareen0 Any updated/findings on this?
cc - @JyotinderSingh

[Vsareen0]

Hey @AshwinKul28 , Thanks for asking ! This is already planned, just time was taken to understand things, will be working on this weekend.

[AshwinKul28]

Hey @Vsareen0 Sorry to bother you again, Do you have any updates on this? If you have any blockers let's discuss this over the discord. Thanks

[lucifercr07]

@Vsareen0 would like to pick this up, if you're not working on this actively.
cc: @JyotinderSingh @AshwinKul28

[JyotinderSingh]

@Vsareen0 would like to pick this up, if you're not working on this actively.

cc: @JyotinderSingh @AshwinKul28

Assigned

[AshwinKul28]

@lucifercr07 Please close the issue if the item is completely shipped. Thanks for this.