python313Packages.billiard: modernize

Removed restriction for Python version older than 3.7 and updated changelog URL to use the source tag.

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

@@ -5,7 +5,6 @@
   setuptools,
   pytestCheckHook,
   psutil,
-  pythonOlder,
 }:
 
 buildPythonPackage rec {
@@ -13,8 +12,6 @@ buildPythonPackage rec {
   version = "4.2.2";
   pyproject = true;
 
-  disabled = pythonOlder "3.7";
-
   src = fetchFromGitHub {
     owner = "celery";
     repo = "billiard";
@@ -39,7 +36,7 @@ buildPythonPackage rec {
   meta = {
     description = "Python multiprocessing fork with improvements and bugfixes";
     homepage = "https://github.com/celery/billiard";
-    changelog = "https://github.com/celery/billiard/blob/v${version}/CHANGES.txt";
+    changelog = "https://github.com/celery/billiard/blob/${src.tag}/CHANGES.txt";
     license = lib.licenses.bsd3;
     maintainers = with lib.maintainers; [ nickcao ];
   };