Bump serde from 1.0.99 to 1.0.100 (#5862)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.99 to 1.0.100.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](https://github.com/serde-rs/serde/compare/v1.0.99...v1.0.100)

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

ledger-tool/Cargo.toml

@@ -11,7 +11,7 @@ homepage = "https://solana.com/"
 [dependencies]
 bincode = "1.1.4"
 clap = "2.33.0"
-serde = "1.0.99"
+serde = "1.0.100"
 serde_derive = "1.0.99"
 serde_json = "1.0.40"
 serde_yaml = "0.8.9"