Fixes --version and --help

src/Contracts/Plugins/Bootable.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Contracts\Plugins;
+
+/**
+ * @internal
+ */
+interface Bootable
+{
+    /**
+     * Boots the plugin.
+     */
+    public function boot(): void;
+}

src/Contracts/Plugins/Shutdownable.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Contracts\Plugins;
+
+/**
+ * @internal
+ */
+interface Shutdownable
+{
+    /**
+     * Shutdowns the plugin.
+     */
+    public function shutdown(): void;
+}