docs: update changelog for 3.0.0

CHANGELOG.md

@@ -3,3 +3,29 @@
 All notable changes to this project from MapillaryJS 3.x will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## 3.0.0 - 2020-12-10
+
+### :rocket: New features
+- Add `qualityScore` property on `Node`
+- Data provider API to enable loading data from any source
+
+### :boom: Breaking
+- Change `Viewer` constructor to take only an options struct as parameter
+- Remove `Viewer` class `moveCloseTo` method
+- Rename `Viewer` class `setAuthToken` method to `setUserToken`
+- Rename `Node` class `cameraProjection` property to `cameraProjectionType`
+- Remove `StatsComponent`
+- Remove `LoadingComponent`
+- Move `IUrlOptions` properties to `IFalcorDataProviderOptions`
+
+### :memo: Documentation
+- Add data provider info to documentation
+- Restructure readme information
+- Add GitHub specific content
+- Add changelog
+
+### :house: Internal
+- Rename `Container` class `element` property to `container`
+- Use GitHub actions for continuous integration
+- Use Yarn for development