Add a notice to the nnbd_migration package README.

I plan to publish this on pub, and then mark the package as
discontinued.  Customers should invoke NNBD migration using the `dart
migrate` command.

Change-Id: Ia871e71258e3951ac7fd866e46ae97043a6fa93c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/167364
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>
This commit is contained in:
Paul Berry 2020-10-13 16:29:08 +00:00 committed by commit-bot@chromium.org
parent d0fafb6329
commit d6292f99c2

View file

@ -2,6 +2,8 @@
**Note**:
* This migration tool is now available through the SDK, using the `dart
migrate` command. Support for running it via `pub activate` is deprecated.
* The null safety migration tooling is in an early state and may have bugs and
other issues.
* As null safety is still in preview, we recommend only doing trial