Don't use die() in PHPT --SKIPIF--

Unlocks a performance optimization in PHPUnit 11.x

see https://staabm.github.io/2024/10/19/phpunit-codesprint-munich.html

Tests/phpt/dotenv_overload.phpt

@@ -1,7 +1,7 @@
 --TEST--
 Test Dotenv overload
 --SKIPIF--
-<?php require dirname(__DIR__, 6).'/vendor/autoload.php'; if (4 > (new \ReflectionMethod(\Symfony\Component\Dotenv\Dotenv::class, 'bootEnv'))->getNumberOfParameters()) die('Skip because Dotenv version is too low');
+<?php require dirname(__DIR__, 6).'/vendor/autoload.php'; if (4 > (new \ReflectionMethod(\Symfony\Component\Dotenv\Dotenv::class, 'bootEnv'))->getNumberOfParameters()) echo 'Skip because Dotenv version is too low';
 --INI--
 display_errors=1
 --FILE--