fix: ignore line endings in console output assertions

tests/app/Command/MultilineCommand.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Spiral\Testing\Tests\App\Command;
+
+use Spiral\Console\Command;
+
+final class MultilineCommand extends Command
+{
+    protected const NAME = 'multiline';
+
+    public function perform(): int
+    {
+        $this->writeln('first line');
+        $this->writeln('second line');
+
+        return self::SUCCESS;
+    }
+}