khard: 0.11.1 -> 0.11.3

From the README of khard:

    # vobject version is pinned to 0.9.2 for now because of bug
    # https://github.com/eventable/vobject/issues/39

This is why we explicitely pin the dependency "vobject" via a new python
package in the expression here.

pkgs/applications/misc/khard/default.nix

@@ -1,13 +1,39 @@
-{ stdenv, fetchurl, glibcLocales, python3Packages }:
+{ stdenv, fetchurl, fetchFromGitHub, glibcLocales, python3Packages }:
 
+let
+  vobject = python3Packages.buildPythonPackage rec {
+    version = "0.9.2";
+    name = "vobject-${version}";
+
+    src = fetchFromGitHub {
+      owner = "eventable";
+      repo = "vobject";
+      sha256 = "0zj0wplj8pry98x3g551wdhh12ric7rl6rsd6li23lzdxik82s3g";
+      rev = version;
+    };
+
+    disabled = python3Packages.isPyPy;
+
+    propagatedBuildInputs = with python3Packages; [ dateutil ];
+
+    checkPhase = "${python3Packages.python.interpreter} tests.py";
+
+    meta = with stdenv.lib; {
+      description = "Module for reading vCard and vCalendar files";
+      homepage = http://eventable.github.io/vobject/;
+      license = licenses.asl20;
+      maintainers = [ maintainers.matthiasbeyer ];
+    };
+  };
+in
 python3Packages.buildPythonApplication rec {
-  version = "0.11.1";
+  version = "0.11.3";
   name = "khard-${version}";
   namePrefix = "";
 
   src = fetchurl {
     url = "https://github.com/scheibler/khard/archive/v${version}.tar.gz";
-    sha256 = "0055xx9icmsr6l7v0iqrndmygygdpdv10550w6pyrb96svzhry27";
+    sha256 = "0brnwg7f1qnz83q5d6bl2260wykgjhhrpcxxhr2r9gj66q5hdd69";
   };
 
   # setup.py reads the UTF-8 encoded readme.