updated development info on golang version for build

Author: Roberto Sora

README.md

@@ -1,3 +1,4 @@
+
 arduino-create-agent
 ====================
 
@@ -375,6 +376,8 @@ The results of the upload will be delivered via websocket with messages that loo
 
 ## Development
 
+Please remember that for compile the project, you need go version <= 1.8.7 (more recent versions are not supported for compile)
+
 To clone the repository, run the following command:
 ```
 go get github.com/arduino/arduino-create-agent