The CHANGELOG has carried a 4.0.1 section since the meta floor came down;
this is the pubspec catching up to it, on the owner's word to publish. The
release carries one change and no API movement: the constraint that made
Flutter 3.27 unable to resolve a package built for Dart 3.6.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>