(sysutils/fzf) Updated from 0.17.3 to 0.18.0 (one items fails at make test)

0.18.0
------

- Added placeholder expression for zero-based item index: `{n}` and `{+n}`
    - `fzf --preview 'echo {n}: {}'`
- Added color option for the gutter: `--color gutter:-1`
- Added `--no-unicode` option for drawing borders in non-Unicode, ASCII
  characters
- `FZF_PREVIEW_LINES` and `FZF_PREVIEW_COLUMNS` are exported to preview process
    - fzf still overrides `LINES` and `COLUMNS` as before, but they may be
      reset by the default shell.
- Bug fixes and improvements
    - See https://github.com/junegunn/fzf/milestone/14?closed=1
- Built with Go 1.12.1

0.17.5
------

- Bug fixes and improvements
    - See https://github.com/junegunn/fzf/milestone/13?closed=1
- Search query longer than the screen width is allowed (up to 300 chars)
- Built with Go 1.11.1

0.17.4
------

- Added `--layout` option with a new layout called `reverse-list`.
    - `--layout=reverse` is a synonym for `--reverse`
    - `--layout=default` is a synonym for `--no-reverse`
- Preview window will be updated even when there is no match for the query
  if any of the placeholder expressions (e.g. `{q}`, `{+}`) evaluates to
  a non-empty string.
- More keys for binding: `shift-{up,down}`, `alt-{up,down,left,right}`
- fzf can now start even when `/dev/tty` is not available by making an
  educated guess.
- Updated the default command for Windows.
- Fixes and improvements on bash/zsh completion
- install and uninstall scripts now supports generating files under
  `XDG_CONFIG_HOME` on `--xdg` flag.

See https://github.com/junegunn/fzf/milestone/12?closed=1 for the full list of
changes.

(mef)