php8 support

tests/Internal/CustomZip/ZipFileCustomWriter.php

@@ -1,19 +1,22 @@
 <?php
 
+declare(strict_types=1);
+
+/*
+ * This file is part of the nelexa/zip package.
+ * (c) Ne-Lexa <https://github.com/Ne-Lexa/php-zip>
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace PhpZip\Tests\Internal\CustomZip;
 
 use PhpZip\IO\ZipWriter;
 use PhpZip\ZipFile;
 
-/**
- * Class ZipFileCustomWriter.
- */
 class ZipFileCustomWriter extends ZipFile
 {
-    /**
-     * @return ZipWriter
-     */
-    protected function createZipWriter()
+    protected function createZipWriter(): ZipWriter
     {
         return new CustomZipWriter($this->zipContainer);
     }