• Support for directly passing querystring as find options like $this->Posts->find('search', $this->request->query) has been removed. You will get an exception trying to do so.
• SearchBehavior::filterParams() is deprecated. Instead you should just use the custom search finder as $this->Posts->find('search', ['search' => $this->request->query])
• Like filter now allows configuring the wildcard characters.
• The PrgComponent is now by default enabled only for "index" and "lookup" actions. You can modify the actions as needed using the actions key in component config.