function arrayify (item) {
  if (!item) {
    return []
  }
  if (typeof item === 'string') {
    return [item]
  }
  if (Array.isArray(item)) {
    return item
  }
  if (typeof item === 'object') {
    return Object.values(item)
  }
  return []
}
Given a string, object, falsey, or array - return an array.
@param {mixed} item