biber: version bump to 1.9

pkgs/tools/typesetting/biber/default.nix

···
 , UnicodeLineBreak, URI, XMLLibXMLSimple, XMLLibXSLT, XMLWriter }:
 
 let
-  version = "1.8";
+  version = "1.9";
   pn = "biblatex-biber";
 in
 buildPerlPackage {
   name = "biber-${version}";
   src = fetchurl {
     url = "mirror://sourceforge/project/${pn}/${pn}/${version}/${pn}.tar.gz";
-    sha256 = "0ffry64pdvg5g487r7qab5b3cs4kq8rq8n3bymxrr1qh3mp79k4n";
+    sha256 = "1a3iq7l9i54f8nfzjmp1qdb6aqm7977q1g4san470010fkfbvjdc";
   };
 
   buildInputs = [