libconfuse: 3.0 -> 3.2.1

Semi-automatic update. These checks were performed:

- built on NixOS
- found 3.2.1 with grep in /nix/store/vawbik92wwnh9y8la6xwy1cqhmra3m7s-libconfuse-3.2.1
- found 3.2.1 in filename of file in /nix/store/vawbik92wwnh9y8la6xwy1cqhmra3m7s-libconfuse-3.2.1

pkgs/development/libraries/libconfuse/default.nix

@@ -2,10 +2,10 @@
 
 stdenv.mkDerivation rec {
   name = "libconfuse-${version}";
-  version = "3.0";
+  version = "3.2.1";
 
   src = fetchFromGitHub {
-    sha256 = "0021768bxqdxn84yaipncgi64889zrhc0r4ifmlfxirwq101dgr5";
+    sha256 = "1pb74wpg1cxz9hpp0p8i1qq6anaq06mh4xljd8dllm653fxvbjdz";
     rev = "v${version}";
     repo = "libconfuse";
     owner = "martinh";