Move hooks registration to a separate method

src/duplicate-post.php

@@ -74,6 +74,15 @@ public function __construct() {
  $this->revisions_migrator = new Revisions_Migrator();
  $this->watchers = new Watchers( $this->permissions_helper );
 
+ $this->register_hooks();
+ }
+
+ /**
+ * Registers the hooks.
+ *
+ * @return void
+ */
+ protected function register_hooks() {
  $this->post_republisher->register_hooks();
  $this->revisions_migrator->register_hooks();
  }