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

src/Bundle/ChillPersonBundle/Tests/bootstrap.php

@@ -7,6 +7,14 @@
  * 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.
+ */
 if (!is_file($autoloadFile = __DIR__ . '/../vendor/autoload.php')) {
     throw new \LogicException('Could not find autoload.php in vendor/. Did you run "composer install --dev"?');
 }