plantuml: 1.2019.2 -> 1.2019.4

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/plantuml/versions

pkgs/tools/misc/plantuml/default.nix

@@ -1,12 +1,12 @@
 { stdenv, fetchurl, makeWrapper, jre, graphviz }:
 
 stdenv.mkDerivation rec {
-  version = "1.2019.2";
+  version = "1.2019.4";
   name = "plantuml-${version}";
 
   src = fetchurl {
     url = "mirror://sourceforge/project/plantuml/${version}/plantuml.${version}.jar";
-    sha256 = "17b9nwj0r4nbajql611lhy1kkgzigq8p8hkyv90psm7avwyd7fk2";
+    sha256 = "0kd0f7kknl6x1dibh4gsx3pl58bzylx42lxwmh9zv4d53gm6a93r";
   };
 
   nativeBuildInputs = [ makeWrapper ];