python3.pkgs.u-msgpack-python: 2.7.2 -> 2.8.0

pkgs/development/python-modules/u-msgpack-python/default.nix

···
 
 buildPythonPackage rec {
   pname = "u-msgpack-python";
-  version = "2.7.2";
+  version = "2.8.0";
+  format = "setuptools";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-6G96xqoO9MbEnwBLT9Q1vOmcI+LdXXMAPz+YFgJMK9g=";
+    hash = "sha256-uAGoPW7XXm30HkRRi08qnCIdwtpLzVOA46D+2lILxho=";
   };
 
-  LC_ALL="en_US.UTF-8";
+  env.LC_ALL="en_US.UTF-8";
 
   buildInputs = [ glibcLocales ];
 
···
   meta = {
     description = "A portable, lightweight MessagePack serializer and deserializer written in pure Python";
     homepage = "https://github.com/vsergeev/u-msgpack-python";
+    changelog = "https://github.com/vsergeev/u-msgpack-python/blob/v${version}/CHANGELOG.md";
     license = lib.licenses.mit;
   };
-
 }