Cocos Creator 2.3.1

What's new in this version:

Improvements:
- Adapted for WeChat PC game
- Further optimize engine package size on mini-games and web platforms
- Improve API documentation and creator.d.ts declaration
- Added support for TiledMap Object layer Top-Down and Manual rendering order and horizontal and vertical flip
- Support using Backspace button to delete nodes in the scene
- Lock built-in resources to avoid misuse
- Disable evalString calls in native non-JS threads to avoid V8 crashes

Editor:
- Fixed the issue that npm module cannot be used after upgrading to 2.3
- Fixed an issue where VS Code could not break after upgrading to 2.3
- After upgrading to 2.3, it may cause the script to depend on the cycle and an “TypeError: Object prototype may only be an Object or null” error occurs.
- Fixed the problem that plugin path may be wrong when building only scripts on Windows platform
- Fixed the problem of incomplete node display after importing some models
- Fixed the issue that Spine binary files cannot be uploaded on WeChat mini games
- Fixed the issue that the signing certificate generated by Xiaomi to the default path will be deleted during the build

Engine:
- [Core] Optimize the initialization process when dynamically creating Label nodes
- [Core] Fixed the problem that dynamically modifying the material in Prefab will cause other same materials to be changed
- [Core] Fix the rendering level problem that may be caused by repeatedly setting zIndex repeatedly
- [Core] Fixed the issue that the EditBox input box was misplaced after the CanWidth component was checked for fitWidth
- [Core] Fix RichText’s modification and typographical errors when active is false
- [Core] Fix the first Burst display of 3D particles is incorrect
- [Native] Fix the error caused by destroying Mask in event callback
- [Native] Fixed the problem of invalid material switching technology
- [Native] Fix incorrect width and height obtained after window size change
- [Native] Fix the problem that the widget is not updated after the window size is changed
- [Native] Fix JS native debugging cannot use Performance and Profiler
- [Native] Fix Editbox clicking soft keyboard to collapse triangle, did not trigger edit completion event
- [Native] Fix memory leak when restarting the game
- [Native] Fix the problem that the Android audio module will prevent the device from entering the power saving mode after entering the background
- [Native] Fix window adaptive problem when split screen in Android
- [Native] Fix window size error after Windows platform restart
- [HTML] Fixed the problem that audio cannot be played when safari returns to the game from the background
- [Mini game] Fix the problem that Audio is not destroyed