Re: defcustom :version

[Richard Stallman]

      *** The package-version keyword has been added to provide
      `customize-changed-options' functionality to packages in the future.
      Developers who make use of this keyword must also update the new
      variable `customize-package-emacs-version-alist'.

    I can provide this functionality if you wish. Would you prefer to see an
    option argument PACKAGE added to customize-changed-options or a new
    customize-package-changed-options function? Would you prefer to see this
    before or after the release?

We don't need to do this now, so let's not do it now.