Undefined constant 'Teepluss\Theme\Theme Service Provider' in Laravel 5.3

I have been using teeplus in laravel 4.2 for organizing my themes inside Laravel projects easily and maintain its related assets, layouts and partials for the theme in single directory. Since laravel upgraded into 5.3 How I can use Teeplus again? Please help me or is there any documentation for the latest version?. Thanks in advance

via Chebli Mohamed