alfred: 2018.0 -> 2018.1

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

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

These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 2018.1 with grep in /nix/store/2fj5i6zd4mp4asxchsig266lqz8acliv-alfred-2018.1
- directory tree listing: https://gist.github.com/64f566e02d8018fe290dc3db29fd7c7f

pkgs/os-specific/linux/batman-adv/alfred.nix

@@ -1,14 +1,14 @@
 { stdenv, fetchurl, pkgconfig, gpsd, libcap, libnl }:
 
 let
-  ver = "2018.0";
+  ver = "2018.1";
 in
 stdenv.mkDerivation rec {
   name = "alfred-${ver}";
 
   src = fetchurl {
     url = "http://downloads.open-mesh.org/batman/releases/batman-adv-${ver}/${name}.tar.gz";
-    sha256 = "0mzjgjkmgdrrqa6fbpii9q1xqvg3kvwgq2k2kpdf0vy4xxnypky7";
+    sha256 = "0xkd842yp227jzfybjq8c5s7y5c7amm1f5ai80k8wyjwysnad3w0";
   };
 
   nativeBuildInputs = [ pkgconfig ];