sc2-headless: add pysc2 minigame map pack

pkgs/applications/science/machine-learning/sc2-headless/default.nix

···
 { stdenv
+, callPackage
 , lib
 , fetchurl
 , unzip
···
     by setting nixpkgs config option 'sc2-headless.accept_license = true;'
   ''
 else assert licenseAccepted;
-stdenv.mkDerivation rec {
+let maps = callPackage ./maps.nix {};
+in stdenv.mkDerivation rec {
   version = "3.17";
   name = "sc2-headless-${version}";
 
···
     mkdir -p $out
     cp -r . "$out"
     rm -r $out/Libs
+
+    cp -r "${maps.minigames}"/* "$out"/Maps/
   '';
 
   preFixup = ''
···
       url = "https://blzdistsc2-a.akamaihd.net/AI_AND_MACHINE_LEARNING_LICENSE.html";
       free = false;
     };
+    maintainers = with lib.maintainers; [ danharaj ];
   };
 }

pkgs/applications/science/machine-learning/sc2-headless/maps.nix

···
+{ fetchzip
+}:
+
+{
+  minigames = fetchzip {
+    url = "https://github.com/deepmind/pysc2/releases/download/v1.2/mini_games.zip";
+    sha256 = "19f873ilcdsf50g2v0s2zzmxil1bqncsk8nq99bzy87h0i7khkla";
+    stripRoot = false;
+  };
+
+}