Bump serde from 1.0.98 to 1.0.99 (#5540)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.98 to 1.0.99.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.98...v1.0.99)

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

kvstore/Cargo.toml

@@ -15,7 +15,7 @@ chrono = "0.4.7"
 crc = "1.8.1"
 memmap = "0.7.0"
 rand = "0.6.5"
-serde = "1.0.98"
+serde = "1.0.99"
 serde_derive = "1.0.98"
 
 [dev-dependencies]