Merge pull request #4 from dkarvounaris/fix-3

Fix for #3

Author: AmandoVledder

src/Data/XMLElement.php

@@ -16,7 +16,7 @@ class XMLElement extends SimpleXMLElement
      */
     public function attribute(string $name, mixed $default = null): mixed
     {
-        return $this->attributes()->{$name} ?? $default;
+        return !is_null($this->attributes()->{$name}) ? (string)$this->attributes()->{$name} : $default;
     }
 
     /**

tests/Unit/XMLImportTest.php

@@ -30,6 +30,7 @@ public function test_can_get_element_attributes()
         $path = __DIR__.'/../Features/Import/stubs/notes.xml';
         $xml = XML::import($path)->get()->note;
 
+        $this->assertIsString($xml->attribute('completed'));
         $this->assertEquals('true', $xml->attribute('completed'));
         $this->assertEquals('0', $xml->attribute('stars', '2'));
         $this->assertEquals('1', $xml->attribute('shares', '2'));