mailman: add meta to python deps

pkgs/development/python-modules/django-mailman3/default.nix

@@ -16,4 +16,11 @@ buildPythonPackage rec {
   ];
 
   doCheck = false;
+
+  meta = with stdenv.lib; {
+    description = "Django library for Mailman UIs";
+    homepage = https://gitlab.com/mailman/django-mailman3;
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ globin peti ];
+  };
 }

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

@@ -10,4 +10,12 @@ buildPythonPackage rec {
   };
 
   propagatedBuildInputs = [ six httplib2 ];
+
+  meta = with stdenv.lib; {
+    homepage = "http://www.gnu.org/software/mailman/";
+    description = "REST client for driving Mailman 3";
+    license = licenses.lgpl3;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ peti globin ];
+  };
 }