feat: export rehydrateChildren from package

Author: simon360

packages/react-from-markup/src/index.ts

@@ -1 +1 @@
-export { default } from "./rehydrator";
+export { default, rehydrateChildren } from "./rehydrator";

packages/react-from-markup/src/rehydrator.ts

@@ -106,4 +106,4 @@ export default async (
   await Promise.all(renders.map(r => r().then(render)));
 };
 
-export { IRehydrator, rehydratableToReactElement };
+export { IRehydrator, rehydratableToReactElement, rehydrateChildren };