Use colors module for cli output

This _PR_ attempts to replace the _ANSI_ control characters _(used to colourize the cli output)_ with the _"colors"_ node module.

_Background:_
The testing output modifies the terminal-colors and leaves the 'foreground-color' _"black"_ which renders the terminal to be unreadable when using a "dark" background.

Maybe you want to have a look..

regards
~david