pull down to refresh, behave likes App list refreshing
npm install tz-better-scroll-pull-downThe ability to inject a pull-down refresh for BetterScroll.
``js
import BScroll from 'tz-better-scroll-core'
import Pulldown from 'tz-better-scroll-pull-down'
BScroll.use(Pulldown)
const bs = new BScroll('.wrapper', {
pullDownRefresh: true
})
``