YITH WooCommerce Auctions Premium 4.8.0

* New: Support for WooCommerce 5.3
* Update: YITH plugin framework
* Fix: fixed selector in the WooCommerce products page
* Fix: fixed an issue with non-auction type products in the watchlist
* Dev: yith_wcact_time_left_to_start_text filter

* New: support for WordPress 5.7
* New: Support for WooCommerce 5.1
* Update: YITH plugin framework
* Fix: Enqueue the shortcode script outside product page
* Tweak: Check if the auction has not bids in the widget
* Tweak: Added an option to deactivate countdown reload with ajax (overtime)
* Dev: Filter yith_wcact_widget_current_bid_message
* Dev: Filter yith_wcact_add_cart_item
* Dev: Filter yith_wcact_get_cart_item_from_session
* Dev: Filter yith_wcact_auction_winner_content_message
* Dev: Filter yith_wcact_auction_list_per_page
* Dev: Filter yith_wcact_auction_amount_export_csv_per_page
* Dev: Filter yith_wcact_is_sealed_on_list_bids
* Dev: Filter yith_wcact_set_categories_query_args

* New: Support to WooCommerce 5.0
* Update: YITH plugin framework
* Fix: plugin strings
* Dev: New js triggers on fontend.js