WooCommerce Product Bundles 8.1.2

* Fix - Incorrectly displayed cart subtotals when cart discounts exist.
* Fix - Unable to intercept bundled variable product custom attribute values with quotes after adding to cart.

* Fix - Fatal error when calling deprecated function 'WC_PB_Display::table_item_class'.
* Fix - Bundled item quantity update using +/- inputs in Chrome not triggering totals update.
* Fix - Renamed 'bundle_add_to_cart_url' and 'bundle_add_to_cart_text' filters to 'woocommerce_product_add_to_cart_url' and 'woocommerce_product_add_to_cart_text' for compatibility with third-party code.

* Fix - WooCommerce REST API v2 support added.
* Fix - Wrong product bundle title displayed in cart validation messages.
* Fix - Duplicate bundled cart items when renewing/resubscribing to subscription bundles created with 'WooCommerce Subscribe All the Things'.
* Fix - Prevent bundles with subscriptions from being purchased if "Mixed Checkout" is disabled under 'Settings > Subscriptions'.
* Fix - Prevent bundles with multiple subscriptions from being purchased if support for 'multiple_subscriptions' is not declared by any gateway. Prevents issues with resubscribing and potential issues with renewing.
* Tweak - Prevent stock cache clearing when product transients are cleared under WC 3.0+.