message: Used a common node 4 support drop message in CHANGELOG.
diff: @@ -21,8 +21,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
  this was done by default. Now requires explicit option.
  - BREAKING: inlinining functions in `import-utils` require an explicit
  `analyzer` argument.
  -- BREAKING: Dropped support for node 4 in latest `polymer-analyzer`:
  - https://www.polymer-project.org/2.0/docs/tools/node-support
  +- BREAKING: Dropped support for node v4, added support for node v8. See our
  + [node version support policy]
  + (https://www.polymer-project.org/2.0/docs/tools/node-support) for details.
  - Fixed an issue where bundler was adding `<html>`, `<head>`, and `<body>` tags
  to documents that didn't have them.
  