WooCommerce Product Bundles 7.1.0

* Fix - Fatal error when trying to get product bundle prices incl/excl tax under WC 2.6-.
* Fix - Warning when duplicating bundles.
* Fix - Bundle total not showing up under some rare circumstances.
* Fix - Variation attributes not showing up in cart if variable bundled product title is overridden.
* Fix - Warnings due to use of deprecated 'WC_Coupon' properties under WC 3.0+.

* Fix - One Page Checkout integration.
* Fix - Workaround for "Request-URI Too Long" error when configuring the "Filter Variations" option of bundled variable products with more than 100 variations.
* Fix - Some warnings when using PHP 7.1.

* Fix - Infinite loop when exporting order data to Shipstation/Shipwire under WC 3.0. Triggered when 'WC_PB_Order::get_order_items' is used as a 'woocommerce_order_get_items' filter callback.
* Fix - Bundled variable product image not updating when choosing variations if the featured post image is undefined.