nodes/slideshow: adjust for love2d 11+

nodes/slideshow.lua

@@ -30,11 +30,11 @@ function node:processFiles(files)
   local nFiles = {}
 
   for _, f in ipairs(files) do
-    if love.filesystem.isDirectory(f) then
+    if love.filesystem.getInfo(f).type == "directory" then
       print(f, "is directory")
       for _, nf in ipairs(love.filesystem.getDirectoryItems(f)) do
         print(nf, "hey")
-        if love.filesystem.isFile(f .. "/" .. nf) then
+        if love.filesystem.getInfo(f .. "/" .. nf).type == "file" then
           nFiles[#nFiles + 1] = f .. "/" .. nf
         end
       end