Merge pull request #172 from Unity-Technologies/bump_to_2.0.2

Bump to 2.0.2

README-ZH.md

 
 #### Unity
 
-安装 **Unity 2019.4.25f1c2**（_unityhub://2019.4.25f1c2/44dea2b5e6e6_）或 **Unity 2019.4.26f1c1**。 你可以从[https://unity3d.com/get-unity/download](https://unity3d.com/get-unity/download)下载最新的Unity。
+UIWidgets的各个版本所需的Unity版本如下表所示。您可以从[https://unity3d.com/get-unity/download](https://unity3d.com/get-unity/download)下载最新的Unity。
+
+| UIWidgets 版本     |  Unity 2019 LTS  |  Unity 2020 LTS  | 
+| -----------------------------------------------| ------------------------- | ------------------------- |
+| 1.5.4 及以下     | 2019.4.10f1 及以上  | N\A |
+| 2.0.1   | 2019.4.26f1c1  | N\A |
+| 2.0.2 及以上   | 2019.4.26f1c1 及以上 | N\A |
 
 #### UIWidgets包
 
 
 #### 七、图片导入设置
 请将图片放入StreamingAssets下，而后用```Image.file```读取
+
+#### 八、自动降低帧率
+目前在默认情况下，为了保证流畅度，项目在各个平台上均会以最高的刷新频率运行。不过您可以通过在代码中设置```SchedulerBinding.MEnableAutoAdjustFramerate = true```的方式来开启自动降帧的功能：该功能开启后，在UI内容不变的情况下我们将降低项目的刷新率来降低耗电。
 
 
 ## 调试UIWidgets应用程序

README.md

 
 #### Unity
 
-Install **Unity 2019.4.25f1c2** (_unityhub://2019.4.25f1c2/44dea2b5e6e6_) or **Unity 2019.4.26f1c1**. You can download the latest Unity on https://unity3d.com/get-unity/download.
+The compatible Unity versions for each UIWidgets release are listed below. You can download the latest Unity on https://unity3d.com/get-unity/download.
+
+| UIWidgets version     |  Unity 2019 LTS  |  Unity 2020 LTS  | 
+| -----------------------------------------------| ------------------------- | ------------------------- |
+| 1.5.4 and below     | 2019.4.10f1 and above  | N\A |
+| 2.0.1   | 2019.4.26f1c1  | N\A |
+| 2.0.2 and above   | 2019.4.26f1c1 and above | N\A |
 
 #### UIWidgets Package
 Visit our Github repository https://github.com/Unity-Technologies/com.unity.uiwidgets
 #### Image Import Setting
 Please put images under StreamingAssets folder, a and loading it using ```Image.file```.
 
+#### Automatic Framerate Adjustment
+You can enable this feature by setting ```SchedulerBinding.MEnableAutoAdjustFramerate = true``` in your project, which will automatically drop the frame rate of your App to 0 if the UI contents of UIWidgetsPanel is not changed for some time. This will help to prevent battery drain on mobile devices significantly. 
+
+Note that this feature is disabled by default though.
 
 ## Debug UIWidgets Application
 

com.unity.uiwidgets/CHANGELOG.md

 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).
 
+## [2.0.2-preview.1] - 2021-05-31
+
+Major changes are as follows:
+
+### Fixes
+- Android return button support [\#168](https://github.com/Unity-Technologies/com.unity.uiwidgets/pull/168)
+
+### New Features
+- Add engine compilation scripts [\#170](https://github.com/Unity-Technologies/com.unity.uiwidgets/pull/170)
+- On demand rendering support [\#166](https://github.com/Unity-Technologies/com.unity.uiwidgets/pull/166)
+- [Breaking Changes] Use CreateExternalTexture API to share textures on Windows [\#153](https://github.com/Unity-Technologies/com.unity.uiwidgets/pull/153)
+
+
 ## [2.0.1-preview.1] - 2021-05-18
 
 #### In this release we mainly focus on the optimization and stabilization of the framework. 

com.unity.uiwidgets/package.json

 {
 	"name": "com.unity.uiwidgets",
 	"displayName":"UIWidgets",
-	"version": "2.0.1-preview.1",
+	"version": "2.0.2-preview.1",
 	"unity": "2019.4",
 	"description": "UIWidgets allows you to build beautiful cross-platform apps through Unity",
 	"dependencies": {