Added updateMessage

lib/Client/Client.js

@@ -148,6 +148,8 @@ var Client = (function (_EventEmitter) {
 		});
 	};
 
+	// def deleteMessage
+
 	Client.prototype.deleteMessage = function deleteMessage(msg) {
 		var options = arguments.length <= 1 || arguments[1] === undefined ? {} : arguments[1];
 		var callback = arguments.length <= 2 || arguments[2] === undefined ? function (e) {} : arguments[2];
@@ -169,6 +171,29 @@ var Client = (function (_EventEmitter) {
 		});
 	};
 
+	//def updateMessage
+
+	Client.prototype.updateMessage = function updateMessage(msg, content) {
+		var options = arguments.length <= 2 || arguments[2] === undefined ? {} : arguments[2];
+		var callback = arguments.length <= 3 || arguments[3] === undefined ? function (err, msg) {} : arguments[3];
+
+		var self = this;
+		return new Promise(function (resolve, reject) {
+			if (typeof options === "function") {
+				// options is the callback
+				callback = options;
+			}
+
+			self.internal.updateMessage(msg, content, options).then(function (msg) {
+				callback(null, msg);
+				resolve(msg);
+			})["catch"](function (e) {
+				callback(e);
+				reject(e);
+			});
+		});
+	};
+
 	return Client;
 })(EventEmitter);