[nix] Bump the version

Signed-off-by: Douglas Reis <doreis@lowrisc.org>

Author: engdoreis

nix/ftditool.nix

@@ -19,7 +19,7 @@
 }:
 stdenv.mkDerivation {
   pname = "ftditool";
-  version = "0.1.0";
+  version = "0.4.0";
   src = ../.;
 
   nativeBuildInputs = [