LearnPress WooCommerce Add-on 4.1.5

~ Added: get_sale_price and get_regular_price methods for Product extends Woo.
~ Added: check course is out of stock in product.
~ Fixed: default value for Assign package to product.
~ Fixed: image package, course on Gutenberg Woo Page.
~ Tweak: handle button add to cart on the new hook "learn-press/course/html-button-purchase".

~ Fixed: losing method payment on LP Order, with WooCommerce 8.x.x.

4.1.2