updates example required dependencies to support symfony3

composer.json

@@ -19,23 +19,23 @@
 
   "require": {
     "php": ">=5.4.0",
-    "symfony/framework-bundle": "~2.6|~3.0",
-    "doctrine/orm": "~2.4"
+    "symfony/framework-bundle": "^2.6|^3.0",
+    "doctrine/orm": "^2.4"
   },
 
   "require-dev": {
     "php": ">=5.6.0",
     "ext-pdo": "*",
     "ext-pdo_sqlite": "*",
 
-    "symfony/symfony": "~2.7.0|~3.0",
-    "doctrine/orm": "~2.5.0",
-    "doctrine/doctrine-bundle": "~1.5",
-    "doctrine/doctrine-fixtures-bundle": "~2.2.0",
-    "sensio/framework-extra-bundle": "~3.0.9",
-    "knplabs/knp-menu-bundle": "~2.0",
-    "knplabs/knp-time-bundle": "~1.3",
-    "data-dog/pager-bundle": "~0.2",
+    "symfony/symfony": "^3.0",
+    "doctrine/orm": "^2.5",
+    "doctrine/doctrine-bundle": "^1.6",
+    "doctrine/doctrine-fixtures-bundle": "^2.2",
+    "sensio/framework-extra-bundle": "^3.0.2",
+    "knplabs/knp-menu-bundle": "^2.0",
+    "knplabs/knp-time-bundle": "^1.3",
+    "data-dog/pager-bundle": "^0.2",
 
     "phpunit/phpunit": "~4.7.0"
   },

example/src/AppBundle/Menu/MenuBuilder.php

@@ -3,14 +3,17 @@
 namespace AppBundle\Menu;
 
 use Knp\Menu\FactoryInterface;
-use Symfony\Component\DependencyInjection\ContainerAware;
+use Symfony\Component\DependencyInjection\ContainerAwareInterface;
+use Symfony\Component\DependencyInjection\ContainerAwareTrait;
 use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
 use Symfony\Component\Security\Core\User\UserInterface;
 use Symfony\Component\Translation\TranslatorInterface;
 use Symfony\Component\Security\Core\SecurityContextInterface;
 
-class MenuBuilder extends ContainerAware
+class MenuBuilder implements ContainerAwareInterface
 {
+    use ContainerAwareTrait;
+
     /**
      * @param FactoryInterface $factory
      * @return \Knp\Menu\ItemInterface