MysteryStat

• Fix conflict with kotlin in other mods
• Remove clashing config library dependency
• Implement own config file management

Full Changelog: https://github.com/animando/mystery-stat-mod/compare/1.2.0+1.21...1.2.1+1.21

Full Changelog: https://github.com/animando/mystery-stat-mod/compare/1.1.0+1.20.4...1.2.0+1.21

Full Changelog: https://github.com/animando/mystery-stat-mod/compare/1.0.7+1.20.4...1.1.0+1.20.4

Full Changelog: https://github.com/animando/mystery-stat-mod/compare/1.0.5+1.20.4...1.0.6+1.20.4

Full Changelog: https://github.com/animando/mystery-stat-mod/compare/1.0.4+1.20.4...1.0.5+1.20.4