Updated for Minecraft 1.21
- Update to fully support Minecraft 1.20.6/5
- Update build dependencies
- Build using Java 21 for 1.20.5+
- Update to 1.20 by @MFHKiwi in https://github.com/Edgeburn/Squeedometer/pull/3
- Create zh_cn.json by @qznfbnj in https://github.com/Edgeburn/Squeedometer/pull/2
