Function merge

lib/utils.js:5–14

(target, source)

}

export function merge (target, source) {
  Object.keys(source).forEach((key) => {
    if (Object.prototype.toString.call(source).slice(8, -1) === 'Object') {
      target[key] = merge(target[key] || {}, source[key])
    } else {
      target[key] = source[key]
    }
  })
  return target
}