Updated to Vim 9.1.0727

This update mostly syncs to new upstream Vim version, along with small fixes.

Features
====================

New Vim features
--------------------

- Vim now supports the XDG Base Directory Specification. You can now put your
  vimrc and plugins in `~/.config/vim` intsead of `~/.vim` / ~/.vimrc`. See `:h
  xdg-base-dir`. v9.1.0327
- Auto completion
    - Matched text in a completion popup menu will now be highlighted v9.1.0476
    - Insert mode fuzzy completion (`:set completopt+=fuzzy`). v9.1.0463 / v9.1.0598
- New options:
    - `tabclose`: specifies tab closing behavior. v9.1.0572
    - `winfixbuf`: fixes a window to a buffer and prevent navigating away from
      it. v9.1.0147
- New functions:
    - `getregion()` / `getregionpos()`: Helps retrieve the text selected in a
      visual selection. v9.1.0120 v9.1.0142 v9.1.0394
    - `diff()`: Diff provided strings. v9.1.0071
    - `gettext()` / `bindtextdomain()`: Vim plugins can now add localized
      messages. v9.1.0509.
    - `filecopy()`: Copy a file using Vim script. v9.1.0465
- New bundled optional plugins (use `packadd` to enable them):
    - comment: toggle code comments on/off. vim/vim#14634
    - nohlsearch: simple package to automatically set `nohlsearch`. vim/vim#15042
- Highlighting for diff files are back to normal. v9.1.0016
- Vim9 script improvements.
- Miscellaneous smoothscroll, termdebug, security fixes.
- Other platforms (these don't affect MacVim and included for reference only):
    - GTK Vim GUI can now also use <D-...> to map super keys, similar to MacVim
      for its Cmd key mappings. This should allow sharing cross-platform
      configs easier. v9.1.0058
    - Vim GUI now supports Wayland in Linux. v9.1.0064

Misc
--------------------

- When resizing MacVim, the title bar's message looks a little nicer now. #1488
  by @sfsam
- Copyright disclaimer in About MacVim no longer shows a year. #1497

General
====================

- Sparkle (updater for MacVim) is now updated to 2.6.4. For legacy builds it's
  now updated to 1.27.3.  #1494

Fixes
====================

- Fixed dragging tabs to reorder them resulting in a crash. #1499

Compatibility
====================

Requires macOS 10.9 or above. (10.9 - 10.12 requires downloading a
separate legacy build)

Script interfaces have compatibility with these versions:

- Lua 5.4
- Perl 5.30
- Python2 2.7
- Python3 3.9 or above
- Ruby 3.3