2.1.1rc2

Hello Superset Community,

This is a call for the vote to release Apache Superset version 2.1.1.

The release candidate:
https://dist.apache.org/repos/dist/dev/superset/2.1.1rc2/

Git tag for the release:
https://github.com/apache/superset/tree/2.1.1rc2

The Change Log for the release:
https://github.com/apache/superset/blob/2.1.1rc2/CHANGELOG.md

The Updating instructions for the release:
https://github.com/apache/superset/blob/2.1.1rc2/UPDATING.md

Public keys are available at:
https://www.apache.org/dist/superset/KEYS