message: miner_client: Update default cnnection port
diff: @@ -17,7 +17,7 @@ use std::sync::Arc;
  #[derive(Debug, Clone, Parser, Default)]
  #[clap(name = "starcoin-miner", about = "Starcoin Miner")]
  pub struct StarcoinOpt {
  - #[clap(long, short = 'a', default_value = "127.0.0.1:9870")]
  + #[clap(long, short = 'a', default_value = "127.0.0.1:9880")]
  pub server: String,
  #[clap(long, short = 'u')]
  pub user: String,
  