Changelog entry for .packages breaking change
Changelog entry for .packages breaking change

Change-Id: I40d03b47a9f0e4ebe4d3c95d8ab8101a2fd0f7b7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/251765
Reviewed-by: Kevin Moore <1d6e7d10d051cf619c5282da3c28fd8d3e0a65a4@google.com>
Reviewed-by: Jonas Jensen <c9327fa216ae2ef84df7c55b809d4ba270141b48@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk