border for cmp and float windows

lua/config/options.lua

@@ -23,7 +23,7 @@ opt.showmatch = true       -- Show matching braces
 opt.wrap = true            -- When on, lines longer than the width of the window will wrap and displaying continues on the next line
 opt.list = true
 opt.hidden = true
-opt.winborder = 'rounded'
+opt.winborder = 'none'
 opt.scrolloff = 4
 opt.shiftround = true
 opt.relativenumber = false