message: clap::ErrorKind only used when multi-threaded feature is enabled
diff: @@ -9,7 +9,7 @@ use std::{
  };
  use cfg_if::cfg_if;
  -use clap::{ArgMatches, ErrorKind as ClapErrorKind};
  +use clap::ArgMatches;
  use directories::ProjectDirs;
  use serde::Deserialize;
  @@ -183,7 +183,7 @@ impl Config {
  #[cfg(feature = "multi-threaded")]
  match matches.value_of_t::<usize>("WORKER_THREADS") {
  Ok(worker_count) => self.runtime.worker_count = Some(worker_count),
  - Err(ref err) if err.kind == ClapErrorKind::ArgumentNotFound => {}
  + Err(ref err) if err.kind == clap::ErrorKind::ArgumentNotFound => {}
  Err(err) => err.exit(),
  }
  