python310Packages.delorean: Fix build

Propagate missing pytz dependency.

Also set explicit format, use hash for src fetcher.

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

···
 , babel
 , humanize
 , python-dateutil
+, pytz
 , tzlocal
 }:
 
 buildPythonPackage rec {
   pname = "Delorean";
   version = "1.0.0";
+  format = "setuptools";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0d31ay7yq2w7xz7m3ssk5phjbm64b2k8hmgcif22719k29p7hrzy";
+    hash = "sha256-/md4bhIzhSOEi+xViKZYxNQl4S1T61HP74cL7I9XYTQ=";
   };
 
-  propagatedBuildInputs = [ babel humanize python-dateutil tzlocal ];
+  propagatedBuildInputs = [
+    babel
+    humanize
+    python-dateutil
+    pytz
+    tzlocal
+  ];
 
-  pythonImportsCheck = [ "delorean" ];
+  pythonImportsCheck = [
+    "delorean"
+  ];
 
   # test data not included
   doCheck = false;