Roll to pickup pool changes

BUG=
R=rmacnak@google.com

Review-Url: https://codereview.chromium.org//3014633002 .
198 files changed
tree: 6800d011c940bf54fa68f987b7c804a156a97f24
  1. README.md
  2. codereview.settings
  3. packages/
  4. pubspec.yaml
  5. roll.py
README.md

Snapshot of Observatory pub package dependencies needed to build

The pubspec.yaml in this repository is the source of truth