snd: 18.2 -> 18.3

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/snd/versions.

These checks were done:

- built on NixOS
- ran ‘/nix/store/18mdi0m90asngnmnf313bbkpyyzjs96b-snd-18.3/bin/snd --help’ got 0 exit code
- found 18.3 with grep in /nix/store/18mdi0m90asngnmnf313bbkpyyzjs96b-snd-18.3
- directory tree listing: https://gist.github.com/3e3d90a56bba746c97163a9bc00919f2

pkgs/applications/audio/snd/default.nix

@@ -4,11 +4,11 @@
 }:
 
 stdenv.mkDerivation rec {
-  name = "snd-18.2";
+  name = "snd-18.3";
 
   src = fetchurl {
     url = "mirror://sourceforge/snd/${name}.tar.gz";
-    sha256 = "0b0ija3cf2c9sqh3cclk5a7i73vagfkyw211aykfd76w7ibirs3r";
+    sha256 = "117sgvdv0a03ys1v27bs99mgzpfm2a7xg6s0q6m1f79jniia12ss";
   };
 
   nativeBuildInputs = [ pkgconfig ];