message: [bugfix] unify functional slots in lower vue version
diff: @@ -57,7 +57,7 @@ function install(this: ComponentOptions<Vue>, Vue: VueConstructor) {
  // unify slots & scopedSlots
  export function unifySlots(context: RenderContext) {
  - const { scopedSlots = {} } = context;
  + const scopedSlots = context.scopedSlots || context.data.scopedSlots || {};
  const slots = context.slots();
  Object.keys(slots).forEach(key => {
  