YITH WooCommerce Product Bundles Premium 2.4.0

* Update: plugin framework
* Update: language files
* Fix: issue with select for filtering attributes of variable products

* New: support for WooCommerce 4.3
* Update: plugin framework
* Update: language files
* Fix: added bundle product line prices in shipping packages to prevent issues with plugins handling shipping methods
* Dev: added yith_wcpb_add_label filter
* Dev: added yith_wcpb_after_bundled_item_title action
* Dev: added yith_wcpb_bundled_item_quantity_input_step filter
* Dev: added yith_wcpb_bundled_item_quantity_input_min filter
* Dev: added yith_wcpb_bundled_item_quantity_input_max filter
* Dev: added yith_wcpb_allowed_product_types filter

New: support for WooCommerce 4.2
New: support for Aelia Currency Switcher
Update: plugin framework
Update: language files
Fix: rounding price issue in Cart and Checkout