v2.8.1
Menu: fix arrow navigation of SubMenu (#10304)
popup: optimize code (#14413)
Loading: fix loading not disappear in some condition (#9313)
Accessibility for message & message-box & tabs (#7424)
add accessibility for menu
clickoutside: fix memory leak
Calendar: add Calendar component (#14908)
Doc: add back-to-top icon in components page (#3279)
Image: add image component (#15117)
Table/MessageBox/Tree: remove object-assign
Popper: fix memory leak on route change (#9757)
Chore: use resize-observer-polyfill to detect element resizes (#10779)
Utils: scroll-into-view should consider target element's offset parents (#11058)
ScrollBar: cache bar width calculation
Input / Select: fix Korean IME composition bug (#10648)
Fix: migrating config not compatible with camel case props and events (#15260)
Tooltip: displays when initial value is true (#14826)