Fix php-cs-fixer version to 3.13.0 (#8)

See PHP-CS-Fixer/PHP-CS-Fixer#6716

Author: kenjis

composer.json

@@ -21,7 +21,7 @@
     "require": {
         "php": "^7.4 || ^8.0",
         "ext-tokenizer": "*",
-        "friendsofphp/php-cs-fixer": "^3.13",
+        "friendsofphp/php-cs-fixer": "3.13.0",
         "nexusphp/cs-config": "^3.6"
     },
     "require-dev": {