how-to-override-util.md

How do I override the Util class?

You'll need to create your own service provider. It should look something like this.

namespace My\Project\Providers;

use Conner\Tagging\Providers\TaggingServiceProvider as ServiceProvider;
use Conner\Tagging\Contracts\TaggingUtility;

class TaggingServiceProvider extends ServiceProvider {

	/**
	 * Register the service provider.
	 *
	 * @return void
	 */
	public function register() 
	{
		$this->app->singleton(TaggingUtility::class, function () {
			return new MyNewUtilClass;
		});
	}

}

Where MyNewUtilClass is a class you have written. Your new Util class obviously needs to implement the Conner\Tagging\Contracts\TaggingUtility interface.