chore: reorder use

src/sign.rs

@@ -1,12 +1,12 @@
+use std::sync::mpsc::channel;
 use clap::{ArgMatches, SubCommand, App, Arg};
 use authenticator::{KeyHandle, AuthenticatorTransports, SignFlags};
-use std::sync::mpsc::channel;
 use authenticator::statecallback::StateCallback;
 use authenticator::authenticatorservice::AuthenticatorService;
+use rust_util::util_clap::{Command, CommandError};
 use crate::fido;
 use crate::digest;
 use crate::fido::U2fV2Challenge;
-use rust_util::util_clap::{Command, CommandError};
 
 pub struct CommandImpl;