Skip test if pcntl not available, remove require-dev

Author: matt

composer.json

@@ -48,9 +48,6 @@
         "sebastian/version": "^6.0.0",
         "staabm/side-effects-detector": "^1.0.5"
     },
-    "require-dev": {
-        "ext-pcntl": "*"
-    },
     "config": {
         "platform": {
             "php": "8.3.0"

tests/end-to-end/cli/child-process-output.phpt

@@ -1,5 +1,10 @@
 --TEST--
 ShutdownHandler does not output when child process exits
+--SKIPIF--
+<?php declare(strict_types=1);
+if (!extension_loaded('pcntl')) {
+    print 'skip: Extension pcntl must be loaded.';
+}
 --FILE--
 <?php declare(strict_types=1);
 $_SERVER['argv'][] = '--do-not-cache-result';