Vim keys (Could you add them, please)

[sergey-samoylov]

It would be nice, if in addition to "arrow-keys navigation" there would be Vim-keys:
j - down
k - up
l - select choice (that is lower cased "L", not capital "I" of course)

This inquirer is nice and pretty text-nav tool, and lots of folks out there use Vim - one of the best, if not THE best text and code editors. So, such feature would add to inquirer more usability.

Thank you for this project. Like it!