Add monitor function interface to node_zeromq

node_zeromq/zmq-tests.ts

@@ -32,4 +32,6 @@ function test5() {
     sock.bind('tcp://127.0.0.1', err => {
         sock.send("some work");
     });
-}
+    sock.monitor();
+    sock.monitor(10);
+}

node_zeromq/zmq.d.ts

@@ -144,6 +144,14 @@ declare module 'zmq' {
         */
         send(msg: any[], flags?: number): Socket;
 
+        /**
+        * Enable monitoring of a Socket
+        *
+        * @param {Number} timer interval in ms > 0 or Undefined for default
+        * @return {Socket} for chaining
+        */
+        monitor(interval?: number): Socket;
+
         /**
          * Close the socket.
          *
@@ -181,5 +189,4 @@ declare module 'zmq' {
     function socket(type: number, options?: any): Socket;
     function createSocket(type: string, options?: any): Socket;
 
-
-}
+}