Support ZSCAN command

• Adds zScan method to Mock #112 (@robertmarney)

Support predis v2.1.2

PRs

• #108 (thank you @codepluswander)
  => fixes #109

New methods: zunionstore, count, watch, unwatch, sscan

Various bug fix (scan, get, hget, hmget, hgetall, incrbyfloat, decrbyfloat)
New methods: zunionstore, count, watch, unwatch, sscan

Support "bitcount", "getbit" and "setbit" Redis commands

Features

• add mocks for "bitcount", "getbit" and "setbit" Redis commands (#106 by @programming-services)

Support "expireat"

v5.2.0

Added `expireat(key, timestamp)`` method (#97)

Update hdel method to support deleting multiple hash fields

• Update hdel method to support deleting multiple hash fields : see #94
• Update CI : see #99

Fix php8: Unsupported operand types

PRs

• #95

Use predis implementation for lrem parameters order

Merge pull request #90 from alex-scott/patch-1

lrem() function - parameters order fixed

Implement zrevrank

Merge pull request #88 from Braxilior/zrevrank

Implement zrevrank

bugfix on zadd and zset

Merge pull request #87 from magnetik/zset-return

Zset methods returns score as string