Imminent code freeze for release 1.4

Hi team,

This is a reminder that today at 11am PT we are going to cut the release-1.4 branch off master.

After that point, any changes that are needed in the 1.4 release will need to be cherrypicked from master to the release-1.4 branch.

Please see for all details about the 1.4 release, including information about how to cherry pick changes.

Jonh Wendell, on behalf of Release Managers team for 1.4.