Suppress unhandled promise rejections on connect

Signed-off-by: deadprogram <[email protected]>

lib/sphero.js

@@ -89,7 +89,7 @@ Sphero.prototype.connect = function(callback) {
     return self.emit.bind(self, name);
   }
 
-  return new Promise(function (resolve, reject) {
+  var p = new Promise(function (resolve, reject) {
     connection.on("open", function() {
       emit("open");
     });
@@ -132,7 +132,10 @@ Sphero.prototype.connect = function(callback) {
       self.emit("ready");
       resolve();
     });
-  }).asCallback(callback);
+  });
+
+  p.suppressUnhandledRejections();
+  return p.asCallback(callback);
 };