python3Packages.speaklater3: init at 1.4

needed for pgadmin4 init
https://github.com/NixOS/nixpkgs/pull/154764

pkgs/development/python-modules/speaklater3/default.nix

···
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "speaklater3";
+  version = "1.4";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "ySYdS2taMEZyMS0esImb4Cj6yRdgGQqA/szTHTo7UEI=";
+  };
+
+  pythonImportsCheck = [ "speaklater" ];
+
+  meta = with lib; {
+    description = "Implements a lazy string for python useful for use with gettext";
+    homepage = "https://github.com/mitsuhiko/speaklater";
+    license = licenses.bsd0;
+    maintainers = with maintainers; [ gador ];
+  };
+}

pkgs/top-level/python-packages.nix

···
 
   speaklater = callPackage ../development/python-modules/speaklater { };
 
+  speaklater3 = callPackage ../development/python-modules/speaklater3 { };
+
   spectral-cube = callPackage ../development/python-modules/spectral-cube { };
 
   speedtest-cli = callPackage ../development/python-modules/speedtest-cli { };