add changelog

Author: senadir

readme.txt

@@ -85,7 +85,27 @@ Release and roadmap notes available on the [WooCommerce Developers Blog](https:/
 
 == Changelog ==
 
+= 5.4.0 - 2021-06-22 =
+
+#### Enhancements
+
+- Made script and style handles consistent. ([4324](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4324))
+- Show loading state in the express payments area whilst payment is processing or the page is redirecting. ([4228](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4228))
+
+#### Bug Fixes
+
+- Fix a warning shown when fees are included in the order. ([4360](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4360))
+- Prevent PHP notice for variable products without enabled variations. ([4317](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4317))
+
+#### Various
+
+- Allow products to be added by SKU in the Hand-Picked Products block. ([4366](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4366))
+- Add Slot in the Discounts section of the Checkout sidebar to allow third party extensions to render their own components there. ([4310](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4310))
+
+
+
 = 5.3.1 - 2021-06-15 =
+
 - Fix Product Categories List block display in Site Editor ([#4335](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4335)).
 - Make links in the Product Categories List block unclickable in the editor ([#4339](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4339)).
 - Fix rating stars not being shown in the Site Editor ([#4345](https://github.com/woocommerce/woocommerce-gutenberg-products-block/pull/4345)).