WooCommerce Composite Products 10.5.0

* Fix - WooCommerce REST API v2 support added.
* Fix - Duplicate child cart items when renewing/resubscribing to subscription-enabled composites created with 'WooCommerce Subscribe All the Things'.

* Important - WooCommerce 3.1 support added.
* Feature - Added support for importing/exporting composite products using the WC product importer/exporter, introduced in WC 3.1.
* Tweak - Added 'woocommerce_composited_cart_item_name' and 'woocommerce_composited_order_item_name' filters.
* Tweak - Introduce runtime caching of composite price methods' output. Use 'woocommerce_composite_prices_hash' filter if applying price filters conditionally and conditions change during a single request.
* Fix - Error on add-to-cart validation of optional Components when "WooCommerce Name Your Price" is installed.

* Fix - Inconsistent server/client-side price totals in single-product bundle pages due to rounding issues.
* Fix - Inaccurate bundle container item subtotals shown in cart due to rounding issues.