Release v2.2.0

[roseduan]

🚀 New Features

• Support Merge operation, to reclaim disk space.
  • Merge will rewrite all the valid data into new file, and delete the old files.
  • It maybe a very time-consuming operation, so it is recommended to use it when the database is idle.
• Add tests in windows, with worlflow.

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This discussion was created from the release Release v2.2.0.