Baseline: 39481ad142469d3ed16d283694c76091b271d523

Important changes:

  - Repository rules instantiated in the same module extensions can
    now refer to each other by their extension-specified names in
    label attributes.

This release contains contributions from many people at Google, as well as Alessandro Patti, Cornelius Riemenschneider, dependabot[bot], Fabian Meumertzheim, George Gensure, Jay Conrod, Keith Smiley, Michael Siegrist, Xdng Yng, xinyu.wang.