update

README.md

@@ -465,7 +465,7 @@ smartsend("/topic", data)
 ```javascript
 await smartsend("/topic", [
     { dataname: "message", data: "Hello", type: "text" }
-], { isPublish: false });
+]);
 ```
 
 #### Julia
@@ -488,7 +488,7 @@ smartsend("/topic", data, fileserver_url="http://localhost:8080")
 ```javascript
 await smartsend("/topic", [
     { dataname: "file", data: largeData, type: "binary" }
-], { fileserverUrl: "http://localhost:8080", isPublish: false });
+], { fileserverUrl: "http://localhost:8080" });
 ```
 
 #### Julia
@@ -694,7 +694,7 @@ asyncio.run(main())
 ```javascript
 const { smartsend } = require('./src/NATSBridge');
 
-await smartsend("/device/command", [
+const { env, msg_json_str } = await smartsend("/device/command", [
     { dataname: "command", data: { action: "read_sensor" }, type: "dictionary" }
 ], {
     replyTo: "/device/response"
@@ -736,7 +736,7 @@ main();
 ```julia
 using NATSBridge
 
-env = NATSBridge.smartsend(
+env, msg_json_str = NATSBridge.smartsend(
     "/device/command",
     [("command", Dict("action" => "read_sensor"), "dictionary")];
     reply_to="/device/response"