message: Prepare to release v3.0.0-pre.4
diff: @@ -5,7 +5,10 @@ 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.4] - 2018-03-27
  +
  - Adds the new rule `iron-form-v1-to-v2`, which warns about `iron-form` being used as a type extension of `<form>`.
  - The fix automatically wraps the `<form is="iron-form">` into an `<iron-form>` and moves `id`, `with-credentials`, `headers` properties and `on-iron-form-*` events from `<form>` to `<iron-form>`.
  