Bojack Beef

• Fixes regression caused by the recent VSCode update: Undo history would disappear after save. @Chillee
• Adds expansion of tildes in :e when opening new files. @Chillee
• Added <C-w> v to split vertically. Thanks @beefsack!
• Added U and u in visual block mode. @xconverge
• Added relative line ranges for Ex-mode (neovim only). @Chillee
• Fixed zc not being able to close folds if the cursor started in the middle of the fold @Chillee