Use the newer `cacheDisplayInRect:toBitmapImageRep:` API instead to work
around this.

Vim's tabmove has two positions where it doesn't do anything, so need to
add 1 to index when moving tab to the right.

Fix macvim-dev#257

Vim patch 8.1.560

Targets macOS 10.8+

Features:
- macOS Mojave (10.14) is now supported.
    - MacVim's UI now works with Dark Mode.
    - Fixed broken rendering and flickering under Mojave when using the
      default Core Text renderer. macvim-dev#757
- guioption 'k' is supported again. macvim-dev#731
    - This option prevents window from resizing when UI elements such as
      toolbars or tabs show or hide themselves.

Fixes:
- Fixed misc fullscreen and window resizing bugs and artifacts macvim-dev#745
- Dragging tabs to reorder now works properly macvim-dev#789
- Fixed timer callback handling in GUI macvim-dev#749
- Fixed native tabs (10.12+) interring with Vim tabs macvim-dev#788
- Fixed Japanese IME Ctrl-U/Ctrl-O handling macvim-dev#742
- Fixed MMShareFindPboard and Cmd-E/Cmd-G interactions macvim-dev#780
- Better handling of guifontwide font size macvim-dev#737
- Better python discovery in default vimrc macvim-dev#739

Known Issues:
- Scrolling performance is slightly worse under Mojave macvim-dev#796

Script interfaces have compatibility with these versions:
- Lua 5.3
- Perl 5.18
- Python2 2.7
- Python3 3.7
- Ruby 2.5

Vim patch 8.1.560

Targets macOS 10.8+

Features:
- macOS Mojave (10.14) is now supported.
    - MacVim's UI now works with Dark Mode.
    - Fixed broken rendering and flickering under Mojave when using the
      default Core Text renderer. #757
- guioption 'k' is supported again. #731
    - This option prevents window from resizing when UI elements such as
      toolbars or tabs show or hide themselves.

Fixes:
- Fixed misc fullscreen and window resizing bugs and artifacts #745
- Dragging tabs to reorder now works properly #789
- Fixed timer callback handling in GUI #749
- Fixed native tabs (10.12+) interring with Vim tabs #788
- Fixed Japanese IME Ctrl-U/Ctrl-O handling #742
- Fixed MMShareFindPboard and Cmd-E/Cmd-G interactions #780
- Better handling of guifontwide font size #737
- Better python discovery in default vimrc #739

Known Issues:
- Scrolling performance is slightly worse under Mojave #796

Script interfaces have compatibility with these versions:
- Lua 5.3
- Perl 5.18
- Python2 2.7
- Python3 3.7
- Ruby 2.5