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

src/Bundle/ChillMainBundle/Tests/Form/Type/PickCenterTypeTest.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\MainBundle\Form\Type;
 
 use Chill\MainBundle\Entity\GroupCenter;
@@ -19,7 +28,7 @@ use Symfony\Component\Form\Test\TypeTestCase;
  * @internal
  * @coversNothing
  */
-class PickCenterTypeTest extends TypeTestCase
+final class PickCenterTypeTest extends TypeTestCase
 {
     /**
      * Test that a user which can reach multiple center