python310Packages.cmd2: add changelog to meta

pkgs/development/python-modules/cmd2/default.nix

···
 buildPythonPackage rec {
   pname = "cmd2";
   version = "2.4.3";
+  format = "setuptools";
 
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "sha256-cYc8Efcr0Z4rHbV4IUcW8NT3yPolAJPGASZamnF97lI=";
+    hash = "sha256-cYc8Efcr0Z4rHbV4IUcW8NT3yPolAJPGASZamnF97lI=";
   };
 
   LC_ALL = "en_US.UTF-8";
···
   ];
 
   disabledTests = [
-    # don't require vim for tests, it causes lots of rebuilds
+    # Don't require vim for tests, it causes lots of rebuilds
     "test_find_editor_not_specified"
     "test_transcript"
   ];
···
 
   doCheck = !stdenv.isDarwin;
 
-  pythonImportsCheck = [ "cmd2" ];
+  pythonImportsCheck = [
+    "cmd2"
+  ];
 
   meta = with lib; {
     description = "Enhancements for standard library's cmd module";
     homepage = "https://github.com/python-cmd2/cmd2";
+    changelog = "https://github.com/python-cmd2/cmd2/releases/tag/${version}";
     license = with licenses; [ mit ];
     maintainers = with maintainers; [ teto ];
   };