v1.0.8: fix: cannot read property 'getBoundingClientRect' of undefined

解决在某种情况下出现的 cannot read property 'getBoundingClientRect' of undefined 报错

v1.0.7: add jest and @vue/test-utils to test component and optimize css

添加jest和@vue/test-utils保证组件质量，优化上拉加载区域样式

v1.0.6: Throttle of scrolling

上拉加载加上防抖

v1.0.5: Fix problems with `finished` props

优化页面数据太少，把finished props改为非必传，数据太少不用显示finished-text及解决该情况下的bug

v1.0.4

Configure rollup packaging to exclude vue

v1.0.3: Internationalization support: zh-CN and en-US

国际化支持中英文

v1.0.1

fix normalizeComponent function dose not get transpiled

v1.0.0

Basically pull to load, pull down to refresh