python3Packages.nbclient: 0.5.8 -> 0.5.9

This also unbreaks the build, as for some reason the bin directory is
empty when doCheck = true and then the postFixup fails.

pkgs/development/python-modules/nbclient/default.nix

@@ -6,25 +6,18 @@
 
 buildPythonPackage rec {
   pname = "nbclient";
-  version = "0.5.8";
+  version = "0.5.9";
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-NPUsycuDGl2MzXAxU341THXcYaJEh/mYcS0Sid4yCiU=";
+    sha256 = "sha256-meRt2vrNC4YSk78kb+2FQKGErfo6p9ZB+JAx7AcHAeA=";
   };
 
   inherit doCheck;
   checkInputs = [ pytest xmltodict nbconvert ipywidgets ];
   propagatedBuildInputs = [ async_generator traitlets nbformat nest-asyncio jupyter-client ];
 
-  postFixup =  ''
-    # Remove until fixed by upstream
-    # https://github.com/jupyter/nbclient/pull/173#issuecomment-968760082
-    rm $out/bin/.jupyter-run-wrapped
-    rm $out/bin/jupyter-run
-  '';
-
   meta = with lib; {
     homepage = "https://github.com/jupyter/nbclient";
     description = "A client library for executing notebooks";