1.4.0 Release Candidate

• Feature: Added new block: "Products by Attribute"
• Enhancement: Added the ability to resize the Featured Product block
• Enhancement: Updated button on Featured Product block to match core button block behavior
• Components: Added new control component GridLayoutControl to manage row/column layout values
• Components: Updated ProductAttributeControl to list only attribute types, then once selected, list terms in that attribute
• Fix: A product without an image will now use the placeholder image in grid-layout block previews
• Fix: Previously, there was a PHP notice when a Featured Product has no background image
• API: Added attr_operator support to products endpoint to compare product attribute terms
• Build: Update packages
• Build: Remove unnecessary internationalization build step