Rebuild lib/api

lib/api.js

@@ -118,6 +118,7 @@ var Steem = function (_EventEmitter) {
         var releaseClose = _this2.listenTo(_this2.ws, 'close', function () {
           debugWs('Closed WS connection with', url);
           _this2.isOpen = false;
+          delete _this2.ws;
           _this2.stop();
 
           if (startP.isPending()) {