Squeedometer

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