feat: adds --version option

src/Pest.php

@@ -0,0 +1,10 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest;
+
+function version(): string
+{
+    return '0.2.2';
+}

src/Plugins/Version.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Pest\Plugins;
+
+use Pest\Contracts\Plugins\HandlesArguments;
+use function Pest\version;
+use Symfony\Component\Console\Output\OutputInterface;
+
+/**
+ * @internal
+ */
+final class Version implements HandlesArguments
+{
+    /**
+     * @var OutputInterface
+     */
+    private $output;
+
+    /**
+     * Creates a new instance of the plugin.
+     */
+    public function __construct(OutputInterface $output)
+    {
+        $this->output = $output;
+    }
+
+    public function handleArguments(array $arguments): array
+    {
+        if (in_array('--version', $arguments, true)) {
+            $this->output->writeln(
+                sprintf('Pest    %s', version()),
+            );
+        }
+
+        return $arguments;
+    }
+}