Add slider tooltips

I've created patch for the bef_sliders.js
I've using custom widget plugin which extends Sliders widget and adding configs for the tooltips like:

    $form[$filter_id]['#attached']['drupalSettings']['better_exposed_filters']['slider_options'][$filter_id]['tooltips'] = TRUE;
    $form[$filter_id]['#attached']['drupalSettings']['better_exposed_filters']['slider_options'][$filter_id]['tooltips_value_suffix'] = '$';

Exactly what I needed! Thanks for publishing the patch <3

Will need schema and update hook