Wrap contact search into a more assistive endpoint

[andrewxhill]

Currently,

  const queryId = await Textile.contacts.search(query, options)
  return eventChannel<SearchEvent>((emitter) => {
    const resultsSub = Textile.events.addContactQueryResultListener((receivedQueryId, contact) => {
      if (receivedQueryId === queryId) {
        emitter({ contact, type: 'contact' })
      }
    })
    const errorSub = Textile.events.addQueryErrorListener((receivedQueryId, error) => {
      if (receivedQueryId === queryId) {
        emitter({ error, type: 'error' })
        emitter(END)
      }
    })
    const doneSub = Textile.events.addQueryDoneListener((receivedQueryId) => {
      if (receivedQueryId === queryId) {
        emitter(END)
      }
    })
    return () => {
      Textile.contacts.cancelSearch()
      resultsSub.cancel()
      errorSub.cancel()
      doneSub.cancel()
    }
  })

Could we just have,

const queryId = await Textile.contacts.search(<query>, onResult, onDone, onError)

related:

#93

[andrewxhill]

deprecated api