Update README

Author: andot

README.md

@@ -156,7 +156,6 @@ package main
 import (
 	"github.com/hprose/hprose-golang/rpc"
 	"github.com/labstack/echo"
-	"github.com/labstack/echo/engine/standard"
 )
 
 func hello(name string) string {
@@ -167,8 +166,8 @@ func main() {
 	service := rpc.NewHTTPService()
 	service.AddFunction("hello", hello)
 	e := echo.New()
-	e.Any("/hello", standard.WrapHandler(service))
-	e.Run(standard.New(":8080"))
+	e.Any("/hello", echo.WrapHandler(service))
+	e.Start(":8080")
 }
 ```