"Tavern" subtree snapshot

This repo is populated with snapshots of the subtree at tapted/bleeding_edge.git:dart/sdk/lib/_internal/pub. It exists to allow Tavern to be pulled in via a rule in Spark's pubspec.yaml.

To update, clone https://github.com/tapted/bleeding_edge.git alongside and run the update.sh script.

For detailed information about Tavern, see https://github.com/tapted/bleeding_edge/