This fixes the following errors with Go 1.15:
```
src/options.go:452:69: conversion from untyped int to string yields a string of one rune, not a string of digits (did you mean fmt.Sprint(x)?)
src/options.go:463:33: conversion from untyped int to string yields a string of one rune, not a string of digits (did you mean fmt.Sprint(x)?)
```

This reverts commit e9bc7331.

The change is no longer necessary since 090dee85.

Fix #2161

- `--phony` renamed to `--disabled` for consistency
    - `--no-phony` is now `--enabled`
- Added `enable-search`, `disable-search`, and `toggle-search` actions
  for `--bind`
- Added `--color` options: `query` and `disabled`

Close #2303

Fix #2289

"alt-" with any case-sensitive character is allowed

This is the opposite of "first" (previously known as "top").

zsh sends SIGCONT when running fzf in a pipe in certain cases,
causing mouse mode to become disabled

Fix #2101

Fix #2293

Close #2287

This reverts commit b62a74b3.

https://github.com/junegunn/fzf/pull/2251#issuecomment-740551383

So you can override the colors and still have the text attributes

    # Default colors and attributes
    fzf

    export FZF_DEFAULT_OPTS='--color hl:-1:underline,hl+:-1:underline:reverse'

    # Default colors with underline+reverse attributes
    fzf

    # Different colors with underline+reverse attributes
    fzf --color hl:176,hl+:177

Related: https://github.com/junegunn/fzf.vim/issues/1197#issuecomment-739804363

Close #2270

https://docs.travis-ci.com/user/installing-dependencies/#installing-packages-on-macos

> By default, the Homebrew addon will not run brew update before
> installing packages. brew update can take a long time and slow down your
> builds.

Some programs use it to set the background color for the whole line.

  fzf --preview "printf 'normal \x1b[42mgreen\x1b[0K \x1b[43myellow\x1b[m\nnormal again'"

  fzf --preview 'delta <(echo foo) <(echo bar) < /dev/tty'

Fix #2249

Fix #2254

- Properly handle extra chars in the buffer. Patch suggested by @mckelly2833.
- Support alt-arrow sequences in \e[1;3A format
- Support shift-alt-arrow sequences in \e[1;10A format