mercurial: 4.1.1 -> 4.3.1

pkgs/applications/version-management/mercurial/default.nix

···
 
 let
   # if you bump version, update pkgs.tortoisehg too or ping maintainer
-  version = "4.1.1";
+  version = "4.3.1";
   name = "mercurial-${version}";
   inherit (python2Packages) docutils hg-git dulwich python;
 in python2Packages.buildPythonApplication {
···
 
   src = fetchurl {
     url = "https://mercurial-scm.org/release/${name}.tar.gz";
-    sha256 = "17imsf4haqgw364p1z9i416jinmfxfia537b84hcg0rg43hinmv3";
+    sha256 = "18hq6vvjsrjsnbs15bvyyfrss35bgc0hgw4wxksdyaj578pg04ib";
   };
 
   inherit python; # pass it so that the same version can be used in hg2git