Release v2.2.2

[roseduan]

🚀 New Features

• Watch Key feature support watch event by key #227 @Jeremy-Run

🎄 Enhancements

• Batch Optimiztion use sync.Pool to optimize db.Put operation #235
• Optimize memory usage enhancement: high memory usage of rosedb #236

🎠 Community

• Thanks to @kebukeYi
  • Change Variable name in openMergeDB (更改变量名称 #228)
  • Avoid parsing wal files repeatedly. (Avoid parsing wal files repeatedly. #229)
• Thanks to @Jeremy-Run
  • Deleted data cannot exist in the index (Deleted data cannot exist in the index #232)
  • fix: solve data race (fix: solve data race #234)
  • fix: destFile may be not exist (fix: destFile may be not exist #243)
• Thanks to @rfyiamcool
  • fix: format code comment for rand_kv (fix: format code comment for rand_kv #240)

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This discussion was created from the release Release v2.2.2.