nix: bump to version 0.5.0

Signed-off-by: Alice Ziuziakowska <a.ziuziakowska@lowrisc.org>

Author: ziuziakowska

nix/ftditool.nix

@@ -19,7 +19,7 @@
 }:
 stdenv.mkDerivation rec {
   pname = "ftditool";
-  version = "0.4.0";
+  version = "0.5.0";
   src = ../.;
 
   nativeBuildInputs = [