v0.4.7

What's Changed

• Fix API crashing by @ahmadbky in #29
• Fix the wrong result of the /overview request by @ahmadbky in #30
• Implement leaderboard locking for ranking calculation by @ahmadbky in #31
• Remove useless files by @ahmadbky in #32
• Remove the rate-limiting middleware actix_governor (may be re-added later)

Full Changelog: v0.4.6...v0.4.7