Nextron

• finally added support for 1.20.2
• fixed /back with non-existent player throws error
• changed invalid player message
• fixed feature command with no arguments resulted in error
• fixed world creation with seed not working
• updated java version to 17 from 16
• fixed vanished players being visible after joining again
• added getposition command

Full Changelog: https://github.com/0PandaDEV/Nextron/compare/v1.5.0...v1.5.1œ