Bump rocksdb from 0.21.0 to 0.22.0

Bumps [rocksdb](https://github.com/rust-rocksdb/rust-rocksdb) from 0.21.0 to 0.22.0.
- [Release notes](https://github.com/rust-rocksdb/rust-rocksdb/releases)
- [Changelog](https://github.com/rust-rocksdb/rust-rocksdb/blob/master/CHANGELOG.md)
- [Commits](rust-rocksdb/rust-rocksdb@v0.21.0...v0.22.0)

---
updated-dependencies:
- dependency-name: rocksdb
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -33,7 +33,7 @@ parking_lot = "0.12"
 serde = { version = "1.0", features = ["derive", "rc"] }
 sha2 = "0.10"
 syntect = "5"
-rocksdb = "0.21"
+rocksdb = "0.22"
 tar = "0.4"
 flate2 = "1.0"
 time = { version = "0.3", features = ["serde"] }