message: remove unnecessary dereferences
  this was caught by clippy
diff: @@ -502,19 +502,19 @@ enum BlacklistSubcommand {
  impl BlacklistSubcommand {
  fn handle_args(self, ctx: BinContext) -> Result<()> {
  - let mut conn = &mut *ctx.conn()?;
  + let conn = &mut *ctx.conn()?;
  match self {
  Self::List => {
  - let crates = db::blacklist::list_crates(&mut conn)
  + let crates = db::blacklist::list_crates(conn)
  .context("failed to list crates on blacklist")?;
  println!("{}", crates.join("\n"));
  }
  - Self::Add { crate_name } => db::blacklist::add_crate(&mut conn, &crate_name)
  + Self::Add { crate_name } => db::blacklist::add_crate(conn, &crate_name)
  .context("failed to add crate to blacklist")?,
  - Self::Remove { crate_name } => db::blacklist::remove_crate(&mut conn, &crate_name)
  + Self::Remove { crate_name } => db::blacklist::remove_crate(conn, &crate_name)
  .context("failed to remove crate from blacklist")?,
  }
  Ok(())
  