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

src/Bundle/ChillMainBundle/Tests/Controller/CenterControllerTest.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\Tests\Controller;
 
 use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
@@ -15,12 +24,12 @@ use Symfony\Bundle\FrameworkBundle\Test\WebTestCase;
  * @internal
  * @coversNothing
  */
-class CenterControllerTest extends WebTestCase
+final class CenterControllerTest extends WebTestCase
 {
     public function testCompleteScenario()
     {
         // Create a new client to browse the application
-        $client = static::createClient([], [
+        $client = self::createClient([], [
             'PHP_AUTH_USER' => 'admin',
             'PHP_AUTH_PW' => 'password',
             'HTTP_ACCEPT_LANGUAGE' => 'fr_FR',