Update itertools requirement from 0.12.0 to 0.13.0

Updates the requirements on [itertools](https://github.com/rust-itertools/itertools) to permit the latest version.
- [Changelog](https://github.com/rust-itertools/itertools/blob/master/CHANGELOG.md)
- [Commits](rust-itertools/itertools@v0.12.0...v0.13.0)

---
updated-dependencies:
- dependency-name: itertools
  dependency-type: direct:production
...

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

Cargo.toml

@@ -24,7 +24,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 bip32 = { version = "0.5.1", default-features=false, features = [ "alloc", "secp256k1-ffi"] }
 blake2 = "0.10.6"
 ethereum-types = "0.14.0"
-itertools = "0.12.0"
+itertools = "0.13.0"
 tiny-keccak = { version = "2.0.0", features = ["keccak"] }
 secp256k1 = { version = "0.27.0", features = [ "recovery" ] }
 tiny-bip39 = "1.0.0"