libre: update 0.4.12 -> 0.4.13

pkgs/development/libraries/libre/default.nix

···
 {stdenv, fetchurl, zlib, openssl}:
 stdenv.mkDerivation rec {
-  version = "0.4.12";
+  version = "0.4.13";
   name = "libre-${version}";
   src=fetchurl {
     url = "http://www.creytiv.com/pub/re-${version}.tar.gz";
-    sha256 = "1wjdcf5wr50d86rysj5haz53v7d58j7sszpc6k5b4mn1x6604i0d";
+    sha256 = "0496nfi7vi6ivnyici5bqs147pwkdqn48w2rajhr5k8jd07pq5qp";
   };
   buildInputs = [zlib openssl];
   makeFlags = [