Bump bs58 from 0.3.0 to 0.3.1

Bumps [bs58](https://github.com/mycorrhiza/bs58-rs) from 0.3.0 to 0.3.1.
- [Release notes](https://github.com/mycorrhiza/bs58-rs/releases)
- [Commits](https://github.com/mycorrhiza/bs58-rs/commits)

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

core/Cargo.toml

@@ -16,7 +16,7 @@ codecov = { repository = "solana-labs/solana", branch = "master", service = "git
 [dependencies]
 bincode = "1.2.1"
 bv = { version = "0.11.1", features = ["serde"] }
-bs58 = "0.3.0"
+bs58 = "0.3.1"
 byteorder = "1.3.4"
 chrono = { version = "0.4.11", features = ["serde"] }
 core_affinity = "0.5.10"