🩹 Fix block type registration in WordPress 6.8 (#344)

Author: harryscheiner

src/Block.php

@@ -271,7 +271,6 @@ public function compose()
                 'category' => $this->category,
                 'icon' => $this->icon,
                 'keywords' => $this->keywords,
-                'parent' => $this->parent ?: [],
                 'post_types' => $this->post_types,
                 'mode' => $this->mode,
                 'align' => $this->align,
@@ -294,6 +293,10 @@ public function compose()
                 },
             ];
 
+            if (filled($this->parent)) {
+                $settings = Arr::add($settings, 'parent', $this->parent);
+            }
+
             if ($this->example !== false) {
                 $settings = Arr::add($settings, 'example', [
                     'attributes' => [