ViaRewind

Adds compatibility with ViaVersion and ViaBackwards 5.11.0

Other changes

• Fixed custom sound handling in 1.9->1.8. (Thanks @Beaness)
• Improved newline chat message handling in 1.8->1.7. (Thanks @Beaness)
• Fixed potential teleport confirm desync in 1.8->1.7. (Thanks @Beaness)

Please also read the 4.1.2 changelog: https://github.com/ViaVersion/ViaRewind/releases/tag/4.1.2

Your support means a lot! If you'd like to help keep the project going, consider donating at: https://florianreuth.de/donate

I'll continue improving this project to the best of my ability.