add multi async instance support

[youtuosoft]

No description provided.

[haohetao]

add multi async instance support
router add these code

const waitForStorageToBeReady = async (to, from, next) => {
  await Promise.all(store.restored)
  next()
}
router.beforeEach(waitForStorageToBeReady)

[nathanbrizzee]

I seem to be running into this problem too when using LocalForage and namespaced modules. The store.restored is being set before all my LocalForage namespaced modules finish loading. Consequently, routes are being displayed when they shouldn't.
Has anyone else experienced this issue?