feat: add new exports from @vue/composition-api

Author: danielroe

src/runtime/composables/vue.ts

@@ -3,6 +3,7 @@ export type {
   ComponentInternalInstance,
   ComponentInstance,
   ComponentPropsOptions,
+  ComponentPublicInstance,
   ComponentRenderProxy,
   ComputedGetter,
   ComputedOptions,
@@ -82,8 +83,10 @@ export {
   toRefs,
   triggerRef,
   unref,
+  useAttrs,
   useCssModule,
   useCSSModule,
+  useSlots,
   version,
   warn,
   watch,