Update gridiron requirement from 0.10 to 0.11

---
updated-dependencies:
- dependency-name: gridiron
  dependency-version: 0.11.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.toml

@@ -35,7 +35,7 @@ ed25519-dalek = { version = "2.1.1", default-features = false, features = [
 ] }
 # Explicit dependency so we can pass the wasm-bindgen flag to it
 getrandom = { version = "0.2", optional = true }
-gridiron = "0.10"
+gridiron = "0.11"
 hex = "0.4"
 lazy_static = "1.4"
 log = "0.4"