Update README.md

TODO update

Author: 이준혁(Junhyeok Lee)

README.md

@@ -32,6 +32,8 @@ For custom torch users, `pip` will not check torch version.
 - [x] devide 1d and 2d modules
 - [x] pip packaging
 - [ ] documentation
+- [ ] rewrite upsample/downsample
+- [ ] apply jinc(torch.special.i1) with updated torch
 
 ## Test results 1d
 | Filter sine              | Filter noise                  |