* Feature - Introduced new assembled/unassembled UI for Composite Products under the 'Product Data > Shipping' tab.
* Feature - Added 'Assembled weight' option under 'Product Data > Shipping' when the 'Assembled' Composite type is active.
* Feature - Support '/subscriptions' REST API endpoint.
* Feature - Introduced support for WooCommerce Memberships: Composite discounts are now inherited by individually-priced Components. Important: Only '%' discounts are supported!
* Tweak - Introduce filter-based method for discounting Component prices in the cart instead of modifying price props directly.
* Tweak - Show '/pc' suffix when max (not min) Component quantity > 1.
* Tweak - Added missing actions for before/after quantity input (thank you, bor0!).
* Tweak - Declared support for WooCommerce 3.9+
