ci: clean style and lower watermark to 3

.horde.yml

@@ -43,4 +43,4 @@ keywords:
 vendor: horde
 quality:
   phpstan:
-    level: 5
+    level: 3

src/Author.php

@@ -5,13 +5,14 @@
 namespace Horde\Victim;
 
 use Stringable;
+use InvalidArgumentException;
 
 class Author implements Stringable
 {
     public function __construct(public readonly string $name, public string $email = '', public string $homepage = '', public string $role = '')
     {
         if (empty($name)) {
-            throw new \InvalidArgumentException('Name cannot be empty');
+            throw new InvalidArgumentException('Name cannot be empty');
         }
     }
 

src/ComposerRootProject.php

@@ -11,7 +11,7 @@ class ComposerRootProject implements Stringable
 {
     public readonly DirectoryIterator $projectRoot;
     public function __construct(
-        string|stringable|DirectoryIterator $projectRoot
+        string|Stringable|DirectoryIterator $projectRoot
     ) {
         $this->projectRoot = new DirectoryIterator($projectRoot);
     }

src/InvalidComposerJsonFileException.php

@@ -5,13 +5,14 @@
 namespace Horde\Victim;
 
 use RuntimeException;
+use Throwable;
 
 class InvalidComposerJsonFileException extends RuntimeException
 {
     public function __construct(
         string $message = 'Invalid composer.json file',
         int $code = 0,
-        ?\Throwable $previous = null
+        ?Throwable $previous = null
     ) {
         parent::__construct($message, $code, $previous);
     }

test/unit/AuthorTest.php

@@ -7,6 +7,7 @@
 use Horde\Victim\Author;
 use PHPUnit\Framework\TestCase;
 use PHPUnit\Framework\Attributes\CoversClass;
+use InvalidArgumentException;
 
 #[CoversClass(Author::class)]
 class AuthorTest extends TestCase
@@ -38,7 +39,7 @@ public function testConstructorWithAllParameters(): void
 
     public function testConstructorThrowsExceptionForEmptyName(): void
     {
-        $this->expectException(\InvalidArgumentException::class);
+        $this->expectException(InvalidArgumentException::class);
         $this->expectExceptionMessage('Name cannot be empty');
 
         new Author('');