Added PHP 7.4 compatibility.
Improved backend performance almost by 100% for large number of options.
Increased the number of available builder columns.
Added Math formula capability for price types.
Added a new product element which can be used to select a product to be added to cart along with the main product.
Fixed compatibility with Composite Products.
Fixed compatibility with WooCommerce Dynamic Pricing & Discounts.
Fixed compatibility with Measurement Price Calculator.
Fixed compatibility with woothemes WooCommerce Subscriptions.
