Update ciphersuite/dkg MSRVs

crypto/ciphersuite/Cargo.toml

@@ -7,7 +7,7 @@ repository = "https://github.com/serai-dex/serai/tree/develop/crypto/ciphersuite
 authors = ["Luke Parker <lukeparker5132@gmail.com>"]
 keywords = ["ciphersuite", "ff", "group"]
 edition = "2021"
-rust-version = "1.74"
+rust-version = "1.73"
 
 [package.metadata.docs.rs]
 all-features = true

crypto/ciphersuite/src/lib.rs

@@ -3,8 +3,11 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 
 use core::fmt::Debug;
-#[cfg(any(feature = "alloc", feature = "std"))]
-use std_shims::io::{self, Read};
+#[allow(unused_imports)]
+use std_shims::{
+  prelude::*,
+  io::{self, Read},
+};
 
 use rand_core::{RngCore, CryptoRng};