修改版本，修改帮助信息

vnt/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "vnt"
-version = "1.1.1"
+version = "1.1.2"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

vnt/src/handle/registration_handler.rs

@@ -178,7 +178,7 @@ fn registration_request_packet(
     request.virtual_ip = ip.into();
     request.allow_ip_change = allow_ip_change;
     request.is_fast = is_fast;
-    request.version = "1.1.1".to_string();
+    request.version = "1.1.2".to_string();
     let bytes = request.write_to_bytes()?;
     let buf = vec![0u8; 12 + bytes.len()];
     let mut net_packet = NetPacket::new(buf)?;