fix remaining clippy warnings

Author: RomarQ

src/transaction/eip7702.rs

@@ -342,7 +342,7 @@ mod tests {
 		rlp_stream.append(&address);
 		rlp_stream.append(&nonce);
 		message.extend_from_slice(&rlp_stream.out());
-		let message_hash = H256::from_slice(Keccak256::digest(&message).as_slice());
+		let message_hash = H256::from_slice(Keccak256::digest(&message).as_ref());
 
 		// Sign the message hash
 		let (signature, recovery_id) = signing_key

src/util.rs

@@ -178,7 +178,7 @@ mod tests {
 		const LENGTH: usize = 32;
 
 		fn hash(x: &[u8]) -> Self::Out {
-			H256::from_slice(Keccak256::digest(x).as_slice())
+			H256::from_slice(Keccak256::digest(x).as_ref())
 		}
 	}