yamprint with colors should extends util.inspect

[patarapolw]

Instead of using your own yamprint-ansi-color, there is already util.inspect.styles.

So, the easiest way to get colors is

import { inspect } from 'util'

import { yamprint, YamprintTheme } from 'yamprint'
import chalk from 'chalk'

const yp = yamprint.extend({
  formatter: Object.entries(inspect.styles).reduce((prev, [k, v]) => ({
    ...prev,
    [k]: (chalk as any)[v]
  }), {
    lineInMultilineBlock: (chalk as any)[inspect.styles.string]
  } as YamprintTheme)
})

But, I just couldn't avoid chalk as a dependency...