nix: bumped rhodecode-vcsserver version to 4.13

pkgs/python-packages.nix

@@ -653,7 +653,7 b''
     };
   };
   rhodecode-vcsserver = super.buildPythonPackage {
-    name = "rhodecode-vcsserver-4.12.0";
+    name = "rhodecode-vcsserver-4.13.0";
     buildInputs = with self; [pytest py pytest-cov pytest-sugar pytest-runner pytest-catchlog pytest-profiling gprof2dot pytest-timeout mock WebTest cov-core coverage configobj];
     doCheck = true;
     propagatedBuildInputs = with self; [Beaker configobj decorator dulwich hgsubversion hg-evolve infrae.cache mercurial msgpack-python pyramid pyramid-jinja2 pyramid-mako repoze.lru simplejson subprocess32 subvertpy six translationstring WebOb wheel zope.deprecation zope.interface ipdb ipython gevent greenlet gunicorn waitress pytest py pytest-cov pytest-sugar pytest-runner pytest-catchlog pytest-profiling gprof2dot pytest-timeout mock WebTest cov-core coverage];