Fix clippy, update old dependencies

processor/ethereum/src/primitives/block.rs

@@ -1,6 +1,7 @@
 use std::collections::HashMap;
 
-use ciphersuite::{Ciphersuite, Secp256k1};
+use ciphersuite::Ciphersuite;
+use ciphersuite_kp256::Secp256k1;
 
 use serai_client::networks::ethereum::Address;
 

processor/ethereum/src/primitives/machine.rs

@@ -2,7 +2,8 @@ use std::{io, collections::HashMap};
 
 use rand_core::{RngCore, CryptoRng};
 
-use ciphersuite::{Ciphersuite, Secp256k1};
+use ciphersuite::Ciphersuite;
+use ciphersuite_kp256::Secp256k1;
 use frost::{
   dkg::{Participant, ThresholdKeys},
   FrostError,

processor/ethereum/src/primitives/output.rs

@@ -1,6 +1,7 @@
 use std::io;
 
-use ciphersuite::{group::GroupEncoding, Ciphersuite, Secp256k1};
+use ciphersuite::{group::GroupEncoding, Ciphersuite};
+use ciphersuite_kp256::Secp256k1;
 
 use alloy_core::primitives::U256;
 

processor/ethereum/src/primitives/transaction.rs

@@ -1,6 +1,6 @@
 use std::io;
 
-use ciphersuite::Secp256k1;
+use ciphersuite_kp256::Secp256k1;
 use frost::dkg::ThresholdKeys;
 
 use alloy_core::primitives::{U256, Address as EthereumAddress};