fix(ts): export types from entry point (#4834)

This was changed in #4829, as i thought it was a mistake (like most of the other entries in that fake file), but /types is required

Author: Haroenv

src/index.es.ts

@@ -103,3 +103,5 @@ import { connectSearchBox } from 'instantsearch.js/es/connectors'`
 });
 
 export default instantsearch;
+
+export * from './types';