WooCommerce Product Add-Ons 6.8.3

* Fix - Hook to toggle the price from add-ons name does not work.
* Fix - Incorrect add-on price according to the location-based tax.
* Fix - Remove duplicate entries from the exclude list in composer.json.
* Fix - Text character limit doesn't show until you start typing in field.
* Fix - The HTML structure for checkboxes and radio buttons is improved.
* Fix - Updated script that reads 'show-incomplete-sub-total' data. Fixes conflict with Composite Products extension.

* Fix - Add option to show incomplete subtotal.
* Fix - Fix CI build errors.

* Fix - Fixed an issue where the subtotal price for a variable product was shown incorrectly on a product page.
* Fix - Fixes an issue in the admin panel when adding add ons.
* Tweak - WC 6.1 compatibility.
* Tweak - WP 5.8 compatibility.