Updated charted DEP to 0.4.X

R=johnmccutchan@google.com

Review URL: https://codereview.chromium.org//2213693002 .
60 files changed
tree: 8c47a47e90f4e6f2ba283507ed52a1feaf1e23aa
  1. packages/
  2. codereview.settings
  3. pubspec.yaml
  4. README.md
  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