feat: basic PHPUnit 10 support

src/Subscribers/EnsureConfigurationIsValid.php

@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Subscribers;
+
+use Pest\Exceptions\AttributeNotSupportedYet;
+use PHPUnit\Event\TestRunner\Configured;
+use PHPUnit\Event\TestRunner\ConfiguredSubscriber;
+
+/**
+ * @internal
+ */
+final class EnsureConfigurationIsValid implements ConfiguredSubscriber
+{
+    /**
+     * Runs the subscriber.
+     */
+    public function notify(Configured $event): void
+    {
+        $configuration = $event->configuration();
+
+        if ($configuration->processIsolation()) {
+            throw new AttributeNotSupportedYet('processIsolation', 'true');
+        }
+    }
+}