Observe image loading for BetterScroll
npm install @better-scroll/observe-imagewhen detecting images is loaded or failed to load, auto refresh BetterScroll's size.
``js
import BScroll from '@better-scroll/core'
import ObserveImage from '@better-scroll/observe-image'
BScroll.use(ObserveImage)
const bs = new BScroll('.wrapper', {
observeImage: true
})
``