need to move arch.promisified into promisified

[kessler]

const regedit = require('regedit').promisified

but then if promisified arch is needed then one has to require again:

const regedit = require('regedit').arch.promisified

This comes more naturally:

const regedit = require('regedit').promisified
await regedit.arch.somemethod()