Bump minimum php-cs-fixer version and adjust format of comment

Author: phil-davis

composer.json

@@ -33,7 +33,7 @@
         "ext-json": "*"
     },
     "require-dev" : {
-        "friendsofphp/php-cs-fixer": "~2.16.1",
+        "friendsofphp/php-cs-fixer": "^2.16.3",
         "phpstan/phpstan": "^0.12",
         "phpunit/phpunit" : "^7.5 || ^8.5 || ^9.0",
         "evert/phpdoc-md" : "~0.1.0",

examples/groupwareserver.php

@@ -12,7 +12,7 @@
  * statement.
  */
 
-/**
+/*
  * UTC or GMT is easy to work with, and usually recommended for any
  * application.
  */