v 5.4 beta 1 is now availabe. WordPress wants to do full site editing with block as a primary goal for 2020. 2 new blocks are added. Buttons and social links. Column block, button, Group and Cover now has more colour options. Latest posts block now supports adding featured images. Toolbar stays on top while using the mobile version.
There is a calender widget that developers are dealing with now. Favicon handling has improved in this version