Export extended interfaces for third-party use

Author: mdingena

src/index.ts

@@ -1,3 +1,5 @@
+export { ExtendedResizeObserverEntry } from './ExtendedResizeObserverEntry';
+export { ObservedElement } from './ObservedElement';
 export { Context } from './Context';
 export { Provider } from './Provider';
 export { createResizeObserver } from './createResizeObserver';