message: Updated CHANGELOG with the rewriteUrlsInTemplates behavior.
diff: # Changelog
  ## Unreleased
  +- Upgraded to Polymer Build ^2.0.0 which uses Polymer Bundler ^3.0.0.
  +- When no specific option is set for Bundler's `rewriteUrlsInTemplates` the CLI attempts to get the version of Polymer for the project using `bower`. When Polymer 2.x is discovered, `rewriteUrlsInTemplates` is defaulted to `false`. In case of Polymer 1.x or where version can not be identified, it defaults to `true`. Any user settings override these defaults.
  - Fix issue where negative `extraDependencies` globs were not working.
  - test: Add support for WCT `config-file` option.
  <!-- Add new, unreleased items here. -->
  