[Feature] library should also export src/common/base/types.dart

[grundid]

Use case

It would be nice if you could also add the above file to exports. Otherwise one cannot create a wrapper and use fields like "SuggestionsItemBuilder" around this widget without having to access an internal file of the library.

Proposal

add the following to flutter_typeahead.dart

export 'package:flutter_typeahead/src/common/base/types.dart';