Update PHP code, code cleanup.

app/Generator/Webhook/StandardMessageGenerator.php

@@ -1,8 +1,8 @@
 <?php
-declare(strict_types=1);
+
 /*
- * WebhookMessageGenerator.php
- * Copyright (c) 2020 james@firefly-iii.org
+ * StandardMessageGenerator.php
+ * Copyright (c) 2021 james@firefly-iii.org
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
@@ -20,6 +20,8 @@ declare(strict_types=1);
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
+declare(strict_types=1);
+
 namespace FireflyIII\Generator\Webhook;
 
 use FireflyIII\Exceptions\FireflyException;