Update package dependencies

[Nico04]

Update package dependencies so it can work with latest Flutter

[Nico04]

I've forked the package and cleaned-up dependencies, if it helps :
https://github.com/Nico04/full_text_search

[Nico04]

I finally removed completly this package and used a much more simple, synchronous, algo :

/// Filter a list of items based on a search string, using a full-text search approach.
/// The [tokenizer] function is used to extract the searchable text from each item.
List<T> fullTextFilter<T>(List<T> items, String? search, List<String?> Function(T item) tokenizer) {
  if (search.isNullOrEmpty) return items;
  final tokens = search!.split(' ').map((s) => s.normalized);
  return items.where((item) {
    final haystack = tokenizer(item).nonNulls.map((s) => s.normalized).join(' ');
    return tokens.every(haystack.contains);
  }).toList(growable: false);
}