libgdx 1.9 发布，此版本的更新内容如下： API Change: Lwjgl3ApplicationConfiguration#setBackbufferConfig -> setBackBufferConfig
- Fixed HexagonalTiledMapRenderer, see https://github.com/libgdx/libgdx/pull/3654
- Added support for locking the screen orientation in GWT, see https://github.com/libgdx/libgdx/pull/3633
- Added Gdx-Kiwi and gdx-lml to extensions, see https://github.com/libgdx/libgdx/pull/3597
- Added Gyroscope support in Input, implemented for Android, see https://github.com/libgdx/libgdx/pull/3594
- Fixed touch mapping on iOS, see https://github.com/libgdx/libgdx/pull/3590
- Added orientation to Box2D Transform class, see https://github.com/libgdx/libgdx/pull/3308
- Added system cursors to GWT, fix 'Ibeam' system cursor not working on LWJGL3.
- Added experimental AndroidApplicationConfiguration#useGL30 and IOSApplicationConfiguration#useGL30 for testing OpenGL ES 3.0 support on mobile devices, do not use in production.
- Fix broken kerning for FreeType fonts, see https://github.com/libgdx/libgdx/pull/3756
- Added ARM64 and x86_64 binaries for Android 下载页面： 1.9.0 Libgdx是什么： 一个作为引擎和游戏基础的高性能，跨平台的游戏开发框架。这个框架允许我们我们专注于基础而不是游戏引擎的新的特性。它具有很棒的灵活性。 
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