Bind to both emacs and vi-insert keymaps in Bash

This is needed when the user changes the editing mode by specifying
`set -o vi` after `source mcfly.bash'.

mcfly.bash

@@ -141,11 +141,14 @@ function mcfly_initialize {
  if ((BASH_VERSINFO[0] >= 4)); then
  # shellcheck disable=SC2016
  if [[ ${MCFLY_BASH_USE_TIOCSTI-} == 1 ]]; then
- bind -x '"\C-r": "mcfly_search_with_tiocsti"'
+ bind -m emacs -x '"\C-r": "mcfly_search_with_tiocsti"'
+ bind -m vi-insert -x '"\C-r": "mcfly_search_with_tiocsti"'
  else
  # Bind ctrl+r to 2 keystrokes, the first one is used to search in McFly, the second one is used to run the command (if mcfly_search binds it to accept-line).
- bind -x "\"$MCFLY_BASH_SEARCH_KEYBINDING\":\"mcfly_search\""
- bind "\"\C-r\":\"$MCFLY_BASH_SEARCH_KEYBINDING$MCFLY_BASH_ACCEPT_LINE_KEYBINDING\""
+ bind -m emacs -x "\"$MCFLY_BASH_SEARCH_KEYBINDING\":\"mcfly_search\""
+ bind -m vi-insert -x "\"$MCFLY_BASH_SEARCH_KEYBINDING\":\"mcfly_search\""
+ bind -m emacs "\"\C-r\":\"$MCFLY_BASH_SEARCH_KEYBINDING$MCFLY_BASH_ACCEPT_LINE_KEYBINDING\""
+ bind -m vi-insert "\"\C-r\":\"$MCFLY_BASH_SEARCH_KEYBINDING$MCFLY_BASH_ACCEPT_LINE_KEYBINDING\""
  fi
  else
  # The logic here is:
@@ -155,10 +158,8 @@ function mcfly_initialize {
  # 2. Type "mcfly search" and then run the command. McFly will pull the last line from the $MCFLY_HISTORY file,
  # which should be the commented-out search from step #1. It will then remove that line from the history file and
  # render the search UI pre-filled with it.
- if [[ -o vi ]]; then
- bind '"\C-r": "\e0i#mcfly: \e\C-m mcfly search\C-m"'
- else
- bind '"\C-r": "\C-amcfly: \e# mcfly search\C-m"'
+ bind -m emacs '"\C-r": "\C-amcfly: \e# mcfly search\C-m"'
+ bind -m vi-insert '"\C-r": "\e0i#mcfly: \e\C-m mcfly search\C-m"'
  fi
  fi
 }