Rename BranchUpdateListener -> RefUpdateListener

This is more correct since it's currently listening to both branches
and tags.

Change-Id: I4dac616529600c137752847199bb74dcaad9c35b
3 files changed
tree: 51588fef660193b8f1e34e0bdd4872541f2992ea
  1. src/
  2. BUILD
  3. external_plugin_deps.bzl