Note working version of node

README.md

@@ -6,6 +6,9 @@ A pair of coupled Unix sockets (or Windows pipes).
 
 Similar to `stream-pair`, but with sockets with real fds. A workaround for <https://github.com/nodejs/node/issues/12716>.
 
+**Note**: This workaround is necessary in node v6.11.1, but not necessary in node v8.2.1.
+I would assume it is also not necessary in later versions.
+
 ## Usage
 
 ```javascript