cs: Switch to a stricter way of coding - this might break in a lot of places.

src/Bundle/ChillActivityBundle/Tests/Security/Authorization/ActivityVoterTest.php

@@ -7,6 +7,15 @@
  * the LICENSE file that was distributed with this source code.
  */
 
+declare(strict_types=1);
+
+/**
+ * Chill is a software for social workers.
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
 namespace Chill\ActivityBundle\Tests\Security\Authorization;
 
 use Chill\ActivityBundle\Test\PrepareActivityTrait;
@@ -24,7 +33,7 @@ use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
  * @internal
  * @coversNothing
  */
-class ActivityVoterTest extends KernelTestCase
+final class ActivityVoterTest extends KernelTestCase
 {
     use PrepareActivityTrait;
     use PrepareCenterTrait;
@@ -44,8 +53,8 @@ class ActivityVoterTest extends KernelTestCase
 
     public function setUp()
     {
-        static::bootKernel();
-        $this->voter = static::$kernel->getContainer()
+        self::bootKernel();
+        $this->voter = self::$kernel->getContainer()
             ->get('chill.activity.security.authorization.activity_voter');
         $this->prophet = new \Prophecy\Prophet();
     }