smplayer: 18.3.0 -> 18.4.0

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/5vy4663v65r0ks1d1jcy0p24m2lk0zmh-smplayer-18.4.0/bin/smplayer -h’ got 0 exit code
- ran ‘/nix/store/5vy4663v65r0ks1d1jcy0p24m2lk0zmh-smplayer-18.4.0/bin/smplayer --help’ got 0 exit code
- found 18.4.0 with grep in /nix/store/5vy4663v65r0ks1d1jcy0p24m2lk0zmh-smplayer-18.4.0
- directory tree listing: https://gist.github.com/25ca7c094ad35c4c5ed4c2c33dfb9be2

pkgs/applications/video/smplayer/default.nix

@@ -1,11 +1,11 @@
 { stdenv, fetchurl, qmake, qtscript }:
 
 stdenv.mkDerivation rec {
-  name = "smplayer-18.3.0";
+  name = "smplayer-18.4.0";
 
   src = fetchurl {
     url = "mirror://sourceforge/smplayer/${name}.tar.bz2";
-    sha256 = "0y7kwcngd0d2d863wnppfvjm1n1l60nn6lsf9r0g4hsf19gkrd46";
+    sha256 = "0q2fbg41djyxsy6jinlnidpcqxvs9bi91ga3fwlgnfh6kxsw2ldd";
   };
 
   buildInputs = [ qtscript ];