@elliette would like to roll package:dwds to the Flutter CLI tool as part of dart-lang/webdev#1627, however, the latest dwds has a version of shelf that is incompatible with our exact pin https://github.com/flutter/flutter/blob/master/packages/flutter_tools/lib/src/commands/update_packages.dart#L37 to work around the a revert that caused a performance regression dart-lang/shelf#189.

The comment states that we should pin until package shelf 2.0, however this is now blocking dwds.