PHP8.3 compatibility (#18)

strftime was deprecated in PHP8.1.0.
This is the only PHP8.3.0 compatibility issue detected by the PHPCompatibility scanner git version right now:

hans@DESKTOP-EE15SLU:~/projects/PHPCompatibility$ ./vendor/bin/phpcs ../wrench/ --standard=PHPCompatibility

FILE: /home/hans/projects/wrench/examples/StatusApplication.php
--------------------------------------------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
--------------------------------------------------------------------------------------------------------------------
 112 | WARNING | Function strftime() is deprecated since PHP 8.1; Use date() or IntlDateFormatter::format() instead
--------------------------------------------------------------------------------------------------------------------

Time: 710ms; Memory: 16MB

Related: #14 and chrome-php/chrome#605

examples/StatusApplication.php

@@ -109,7 +109,7 @@ public function statusMsg($text, $type = 'info'): void
     {
         $data = [
             'type' => $type,
-            'text' => '['.\strftime('%m-%d %H:%M', \time()).'] '.$text,
+            'text' => '['.\date('m-d H:i', \time()).'] '.$text,
         ];
 
         $encodedData = $this->_encodeData('statusMsg', $data);