Sort list of '--version'ed casks.

'brew list --cask --version' produces an unsorted list.

Also, the cask part of 'brew list --version' is unsorted, while the
formulas are (still) sorted.

Library/Homebrew/cmd/list.rb

@@ -221,7 +221,7 @@ def list_casks
             else
               path.basename.to_s
             end
-          end.uniq
+          end.uniq.sort
           cask_paths.map { |name| Cask::CaskLoader.load(name) }
         else
           filtered_args = args.named.dup.delete_if do |n|