1.21.9-10 Support & Cleanup

UStats change-log:

• Updated GitHub repository.
• Updated all plugin dependencies.
• Added support for 1.21.9 MC versions.
• Added support for 1.21.10 MC versions.
• Moved version checking method to separate class.
• Changed plugin version to 1.0.3.

UStats-API change-log:

• Changed plugin API version to 1.0.3.