V0.5.0

更新记录：

1. 🎉 支持演示模式，去试试 command + 4
2. 🎉 支持文档自动排版，去试试 command + shift + L
3. 🐱 给汤圆可乐增加了一个喂罐头的 页面
4. 😂 支持预览模式下，全选右键复制富文本到其他地方
5. 🛠 修复设置中选中当前项也重置、完成对 Mojave 系统的兼容

Update Notes：

1. 🎉 Support presentation mode, go try command + 4
2. 🎉 Support document auto typesetting, go try command + shift + L
3. 🐱 Added a page for feeding cans to TangYuan and Cola.
4. 😂 Support preview mode, full right click copy rich text to other places.
5. 🛠 Fixed reset of selected current item in settings, completed compatibility with Mojave system.