3.1.0-rc.1

• Fix for ESLint "func-names" warnings. #1420
• Major performance improvements. Reduce Javascript bundle size from 376kb to 286kb. #1390
• Fixed breadcrumbs for product and category pages #1403
• Send GA tracking event whenever the last product is removed from the CART#1409
• Fix cart item quantity change rollback #1418
• Changed z-index to higher for header #1422