Add a new recsort method

[emilos]

It would be nice to add a utility to sort objects by key, something like:

const { isPlainObject } = require('pure-conditions')

const recursiveSort = (object) => {
  const newObject = {}
  Object.keys(object).sort().forEach(key => {
    const value = object[key]
    if (isPlainObject(value)) {
      newObject[key] = recursiveSort(value)
    } else {
      newObject[key] = value
    }
  })
  return newObject
}

module.exports = {
  recursiveSort
}

Acceptance criteria

• add a recsort method to object/recsort.js
• add specs
• add docs
• the method is pure (does not throw in any case)

Useful links

https://stackoverflow.com/questions/5467129/sort-javascript-object-by-key