Call notification.onRemove when provided

fixes #10

Author: gor181

dist/react-notification-system-redux.js

@@ -147,6 +147,7 @@ var Notifications = function (_React$Component) {
             onRemove: function () {
               function onRemove() {
                 _this2.context.store.dispatch(actions.hide(notification.uid));
+                notification.onRemove && notification.onRemove();
               }
 
               return onRemove;

dist/react-notification-system-redux.min.js

@@ -73,6 +73,7 @@ var Notifications = function (_React$Component) {
             onRemove: function () {
               function onRemove() {
                 _this2.context.store.dispatch(actions.hide(notification.uid));
+                notification.onRemove && notification.onRemove();
               }
 
               return onRemove;

lib/notifications.js

@@ -28,6 +28,7 @@ class Notifications extends React.Component {
         ...notification,
         onRemove: () => {
           this.context.store.dispatch(actions.hide(notification.uid));
+          notification.onRemove && notification.onRemove();
         }
       });
     });