fix: filetype icon not updating with file change (#119)

lua/lualine/components/filetype.lua

@@ -6,12 +6,12 @@ local function filetype(options)
     local data = vim.bo.filetype
     if #data > 0 then
       local ok, devicons = pcall(require,'nvim-web-devicons')
-      if ok and not options.icon then
+      if ok then
         local f_name,f_extension = vim.fn.expand('%:t'),vim.fn.expand('%:e')
         options.icon = devicons.get_icon(f_name,f_extension)
       else
         ok = vim.fn.exists("*WebDevIconsGetFileTypeSymbol")
-        if ok ~= 0 and not options.icon then
+        if ok ~= 0 then
           options.icon = vim.fn.WebDevIconsGetFileTypeSymbol()
         end
       end