message: Prepare to release v3.0.0-pre.1
diff: @@ -5,7 +5,9 @@ All notable changes to this project will be documented in this file.
  The format is based on [Keep a Changelog](http://keepachangelog.com/)
  and this project adheres to [Semantic Versioning](http://semver.org/).
  -## Unreleased
  +<!-- ## Unreleased -->
  +
  +## [3.0.0-pre.1] - 2017-12-21
  - [BREAKING] Return an object with `warnings` and `analysis` properties
  rather than an array or warnings with an unenumerable `analysis`
  property.
  @@ -13,6 +15,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
  it is not always found, despite being a dependency of polymer-analyzer.
  - Add a test for the `content-to-slot-usages` rule's updates to children
  of `<paper-icon-item>`.
  +- Improved compatibility with Windows. Added Windows CI with appveyor.
  ## [2.3.0] - 2017-11-20
  - Adds the `paper-toolbar-v1-to-v2` rule, which helps upgrade uses of paper-toolbar from v1 to v2 (hybrid) by adding slots to children where appropriate.
  