add empty default constructor

Author: jcheron

src/Ubiquity/attributes/items/BaseAttribute.php

@@ -15,6 +15,10 @@
 abstract class BaseAttribute {
 	use BaseAnnotationTrait;
 
+	public function __construct() {
+
+	}
+
 	public function asAnnotation(): string {
 		return $this->__toString();
 	}