Bump serde from 1.0.112 to 1.0.114 (paritytech#144)

Bumps [serde](https://github.com/serde-rs/serde) from 1.0.112 to 1.0.114.
- [Release notes](https://github.com/serde-rs/serde/releases)
- [Commits](serde-rs/serde@v1.0.112...v1.0.114)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

bridges/bin/node/runtime/Cargo.toml

@@ -19,7 +19,7 @@ default-features = false
 features = ["derive"]
 
 [dependencies.serde]
-version = "1.0.112"
+version = "1.0.114"
 optional = true
 features = ["derive"]
 

bridges/relays/ethereum/Cargo.toml

@@ -25,7 +25,7 @@ num-traits = "0.2"
 parity-crypto = { version = "0.6", features = ["publickey"] }
 parking_lot = "0.10.2"
 rustc-hex = "2.0.1"
-serde = { version = "1.0.112", features = ["derive"] }
+serde = { version = "1.0.114", features = ["derive"] }
 serde_json = "1.0.55"
 sp-bridge-eth-poa = { path = "../../primitives/ethereum-poa" }
 time = "0.2"