add delay option

[coun7zero]

Sometimes the response is too fast (e.g. cache) so delay is good solution to avoid loading spinner if that's shows only for few milliseconds.

Here is my util fot that:

import { createActionHelpers } from 'vuex-loading'

import { delay } from 'lodash/function'

export function createDelayedLoading (options, wait = 1) {
  let actionHelpers = createActionHelpers(options)
  let { startLoading: startLoadingFn, endLoading: endLoadingFn } = actionHelpers
  if (wait) {
    let delayed = null
    actionHelpers = {
      startLoading: (dispatcher, loader, callback) => {
        delayed = delay(() => {
          startLoadingFn(dispatcher, loader, callback)
        }, wait)
      },
      endLoading: (dispatcher, loader) => {
        clearTimeout(delayed)
        endLoadingFn(dispatcher, loader)
      }
    }
  }
  return actionHelpers
}

What do you think about adding something similar to the project?