WooCommerce Product Bundles 8.1.2

* Important - Min/Max bundle size post meta are no longer available via 'WC_Product::get_meta'! Please update your code to use 'WC_Product_Bundle::get_min_bundle_size' and 'WC_Product_Bundle::get_max_bundle_size'.
* Feature - Introduced props for Min/Max Bundle Size fields and made them available in the core Importer/Exporter and REST API.
* Feature - Auto-apply bundle-sells discounts in cart.
* Fix - Fixed broken bundle-sells layout when using Elementor Pro.
* Fix - Bundle catalog price incorrect when using a 'Min Bunde Size' with 'Item Grouping > None'.
* Tweak - Moved 'woocommerce_before_bundled_items' action after bundle-sells title.

* Tweak - Introduce 'bundle_stock_quantity' prop to track the quantity of bundles that are available for purchase, taking bundled item stock limitations into account.

* Fix - Bundled product add-on prices for some add-on types are preserved when 'Priced Individually' is not enabled.
* Tweak - Handle missing '$.fn.wc_product_gallery' function on themes that declare support for PhotoSwipe.
* Tweak - Use 'woocommerce_bundle_price_data' filter to pass min/max bundle size params to the frontend.