* Tweak - Don't restore the credit when the order status changes to 'failed'.

* Tweak - Tested compatibility up to WC 7.0.

* Tweak - Tested compatibility with WP 6.1.

* Fix - Store Credit wasn't re-applied to an order successfully paid after the first payment failed.

* Fix - Store Credit was incorrectly restored after canceling the PayPal payment process.

* Tweak - Don't allow adding to the cart Store Credit products with zero credit amount.

* Tweak - The custom credit amount field is required when adding to the cart a Store Credit product without a default credit amount.

* Tweak - Tested compatibility with WC 6.8.

Fix - Fixed error when customizing the link text in the 'Cart notice' setting.

* Feature - Display the available Store Credit coupons on the Cart and Checkout pages.

* Feature - Added support to product subcategories when restricting the usage of the coupons created from a Store Credit product.

* Tweak - Exclude expired coupons from the Store Credit coupon list on the 'My account' page.

* Tweak - Tested compatibility with WC 6.7.

* Tweak - Added plugin info to the WooCommerce System Status Report.

* Tweak - Tested compatibility with WC 6.6.

* Feature - Added compatibility with 'WooCommerce USPS Shipping'.

* Tweak - Tested compatibility with WP 6.0.

* Fix - Fixed wrong order total when the shipping costs are calculated with 'WooCommerce Shipping & Tax'.

* Fix - Fixed wrong discount in the shipping costs when the taxes are calculated with 'WooCommerce AvaTax'.

Tweak - Tested compatibility with WC 6.5.

* Tweak - Tested compatibility with WC 6.4.

* Fix - Exhausted coupons with the amount format $0.00 were still displayed on the 'My account' page. 

Tweak - Keep the form values when the add-to-cart validation fails with a Store Credit product.

Fix - Fixed compatibility issue when sending AutomateWoo emails.

* Feature - Allow customers to choose the amount of credit to purchase.

* Tweak - Display the credit amount when a Store Credit product is added to the cart.

* Tweak - Updated the 'Store Credit' description text on the 'My Account' page.

* Tweak - Tested compatibility up to WC 6.3.

* Tweak - Tested compatibility with WP 5.9.

* Dev - Use a WC background process to handle the plugin updates.

* Dev - Use a trait instead of a class for implementing the Singleton pattern.

* Dev - Dropped deprecated plugin code up to version 3.9.

* Dev - Removed deprecated constants `WC_STORE_CREDIT_PLUS_VERSION`, `WC_STORE_CREDIT_PLUGIN_DIR`, and `WC_STORE_CREDIT_PLUGIN_URL`.

* Dev - Updated the minimum requirements to WC 3.7, WP 4.9, and PHP 5.6.

* Feature - Added setting to edit the title to Send to someone of Store Credit products.

* Tweak - Tested compatibility with WC 6.0.

* Tweak - Tested compatibility with WC 5.9.

* Tweak - Improved the distribution of the coupon credit over the cart items.

* Fix - Fixed wrong discount when the cart contains many low-priced items.

* Tweak - Tested compatibility up to WC 5.8.

* Fix - Fixed warning caused by the undefined variable `$found`.

* Tweak - Tested compatibility with WC 5.6.

* Fix - The credit is not updated when passing a coupon code to the function `wc_update_store_credit_used_for_order`.

* Feature - Added compatibility with the extension 'WooCommerce PayPal payments'.

* Tweak - Recover the credit used in the order awaiting payment when proceeding to its purchase.

* Tweak - Update the cart session after applying a discount to the shipping costs.

* Tweak - Tested compatibility up to WC 5.5.

* Tweak - Tested compatibility with WP 5.8.