Merge pull request #190 from Polymer/update-changelog

Update changelog

Author: Steve Orvell

CHANGELOG.md

@@ -10,11 +10,36 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
    Unreleased section, uncommenting the header as necessary.
 -->
 
-## Unreleased
+<!-- ## Unreleased -->
+
+## [0.6.0] - 2018-09-13
 
 ### Added
 * Added `@query()`, `@queryAll()`, and `@customElement` decorators ([#159](https://github.com/Polymer/lit-element/pull/159))
 
+### Changed
+* Signficantly changed update/render lifecycle and property API. Render lifecycle
+is now `requestUpdate`, `shouldUpdate`, `update`, `render`, `firstUpdated`
+(first time only), `updated`, `updateComplete`. Property options are now
+`{attribute, reflect, type, hasChanged}`. Properties may be defined in a
+`static get properties` or using the `@property` decorator.
+(https://github.com/Polymer/lit-element/pull/132).
+
+
+### Removed
+* Removed render helpers `classString` and `styleString`. Similar directives
+(`classMap` and `styleMap`) have been added to lit-html and should be used instead
+(https://github.com/Polymer/lit-element/pull/165 and
+https://github.com/Polymer/lit-html/pull/486).
+
+### Fixed
+* The `npm run checksize` command should now return the correct minified size
+(https://github.com/Polymer/lit-element/pull/153).
+* The `firstUpdated` method should now always be called the first time the element
+updates, even if `shouldUpdate` initially returned `false`
+(https://github.com/Polymer/lit-element/pull/173).
+
+
 <!-- ### Changed -->
 <!-- ### Removed -->
 <!-- ### Fixed -->