fix: deprecated #[clap] attributes with #[arg] and #[command]

This PR updates deprecated #[clap(...)] attributes to their modern equivalents in clap 4.x.
The current codebase still uses outdated syntax that has been deprecated since version 4.0.

Pull-Request: #5930.

Author: lido333

examples/autonat/src/bin/autonat_client.rs

@@ -34,15 +34,15 @@ use libp2p::{
 use tracing_subscriber::EnvFilter;
 
 #[derive(Debug, Parser)]
-#[clap(name = "libp2p autonat")]
+#[command(name = "libp2p autonat")]
 struct Opt {
-    #[clap(long)]
+    #[arg(long)]
     listen_port: Option<u16>,
 
-    #[clap(long)]
+    #[arg(long)]
     server_address: Multiaddr,
 
-    #[clap(long)]
+    #[arg(long)]
     server_peer_id: PeerId,
 }
 

examples/autonat/src/bin/autonat_server.rs

@@ -34,9 +34,9 @@ use libp2p::{
 use tracing_subscriber::EnvFilter;
 
 #[derive(Debug, Parser)]
-#[clap(name = "libp2p autonat")]
+#[command(name = "libp2p autonat")]
 struct Opt {
-    #[clap(long)]
+    #[arg(long)]
     listen_port: Option<u16>,
 }
 

examples/autonatv2/src/bin/autonatv2_client.rs

@@ -14,18 +14,18 @@ use rand::rngs::OsRng;
 use tracing_subscriber::EnvFilter;
 
 #[derive(Debug, Parser)]
-#[clap(name = "libp2p autonatv2 client")]
+#[command(name = "libp2p autonatv2 client")]
 struct Opt {
     /// Port where the client will listen for incoming connections.
-    #[clap(short = 'p', long, default_value_t = 0)]
+    #[arg(short = 'p', long, default_value_t = 0)]
     listen_port: u16,
 
     /// Address of the server where want to connect to.
-    #[clap(short = 'a', long)]
+    #[arg(short = 'a', long)]
     server_address: Multiaddr,
 
     /// Probe interval in seconds.
-    #[clap(short = 't', long, default_value = "2")]
+    #[arg(short = 't', long, default_value = "2")]
     probe_interval: u64,
 }