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>

runtime/Cargo.toml

@@ -21,7 +21,7 @@ log = "0.4.8"
 memmap = "0.6.2"
 rand = "0.6.5"
 rayon = "1.2.0"
-serde = { version = "1.0.99", features = ["rc"] }
+serde = { version = "1.0.100", features = ["rc"] }
 serde_derive = "1.0.99"
 serde_json = "1.0.40"
 solana-logger = { path = "../logger", version = "0.19.0-pre0" }