message: Updated CHANGELOG for 3.0.0-pre.1 release.
diff: @@ -6,10 +6,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
  and this project adheres to [Semantic Versioning](http://semver.org/).
  ## Unreleased
  +<!-- Add new, unreleased changes here. -->
  +
  +## [3.0.0-pre.1] - 2017-11-28
  * [BREAKING] Switched the underlying parser/AST for JavaScript from `espree/estree` to `babylon/babel-types`. This was needed to support parsing of important platform features such as dynamic imports and moves us closer to supporting TypeScript.
  * When printing Warnings, use one-based indexes for lines and columns, as most text editors and other tools do.
  -<!-- Add new, unreleased changes here. -->
  ## [2.7.0] - 2017-11-16
  