fix(types): export missing types from runtime-core (#889)

Author: posva

.ls-lint.yml

@@ -1,5 +1,5 @@
 ls:
-  packages/**/{src,__tests__}:
+  packages/*/{src,__tests__}:
     .js: kebab-case
     .ts: camelCase | PascalCase
     .d.ts: camelCase

packages/runtime-core/src/index.ts

@@ -189,6 +189,8 @@ export {
 export { ComponentPublicInstance } from './componentProxy'
 export {
   Renderer,
+  RendererNode,
+  RendererElement,
   HydrationRenderer,
   RendererOptions,
   RootRenderFunction