message: fix(sync): correct interval repeat
diff: import { fromPromise } from 'rxjs/observable/fromPromise'
  +import { of } from 'rxjs/observable/of'
  import { switchMap } from 'rxjs/operators/switchMap'
  import { delay } from 'rxjs/operators/delay'
  import { repeat } from 'rxjs/operators/repeat'
  @@ -29,12 +30,13 @@ export function startSyncServiceInterval () {
  const config = configs[service.serviceID]
  - return fromPromise<void>(downlaod(config)).pipe(
  + return of('').pipe(
  + switchMap(() => fromPromise<void>(download(config))),
  delay(config.duration),
  repeat(),
  )
  })
  - )
  + ).subscribe()
  }
  export async function syncServiceUpload () {
  