python310Packages.od: reenable tests

By adding back repeated-test and removing unittest2.

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

···
-{ lib, buildPythonPackage, fetchPypi, unittest2 }:
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pythonOlder
+, repeated-test
+}:
 
 buildPythonPackage rec {
   pname = "od";
   version = "2.0.2";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.5";
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "sha256-uGkj2Z8mLg51IV+FOqwZl1hT7zVyjmD1CcY/VbH4tKk=";
   };
 
-  # repeated_test no longer exists in nixpkgs
-  # also see: https://github.com/epsy/od/issues/1
-  doCheck = false;
   checkInputs = [
-    unittest2
+    repeated-test
   ];
 
   meta = with lib; {
···
     homepage = "https://github.com/epsy/od";
     license = licenses.mit;
   };
-
 }