dialog: 1.3-20171209 -> 1.3-20180621 (#42512)

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/dialog/versions.

These checks were done:

- built on NixOS
- /nix/store/m0hxh556s4yrr5m1sdbj1hr4kghms99x-dialog-1.3-20180621/bin/dialog passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 1 of 1 passed binary check by having the new version present in output.
- found 1.3-20180621 with grep in /nix/store/m0hxh556s4yrr5m1sdbj1hr4kghms99x-dialog-1.3-20180621
- directory tree listing: https://gist.github.com/a0a4bc59b6cd5033a62a99d509b6903e
- du listing: https://gist.github.com/fd4c8d60fa9ed0c6f0fb56fdaf3f8b2b

pkgs/development/tools/misc/dialog/default.nix

@@ -13,14 +13,14 @@ assert unicodeSupport -> ncurses.unicode && ncurses != null;
 
 stdenv.mkDerivation rec {
   name = "dialog-${version}";
-  version = "1.3-20171209";
+  version = "1.3-20180621";
 
   src = fetchurl {
     urls = [
       "ftp://ftp.invisible-island.net/dialog/${name}.tgz"
       "https://invisible-mirror.net/archives/dialog/${name}.tgz"
     ];
-    sha256 = "1rk72as52f5br3wcr74d00wib41w65g8wvi36mfgybly251984r0";
+    sha256 = "0yjqczlf64yppgvk4i6s0jm06mdr0mb5m6sj39nf891dnbi5jj2a";
   };
 
   buildInputs = [ ncurses ];